Monoprice 25 Watt Stereo Hybrid Tube Amplifier with Bluetooth, Optical, Coaxial, and USB Inputs, and Subwoofer Out
Product # 38360
UPC # 889028125120
$159.99
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What color are the tube and vu lights?
A shopper
on Jan 2, 2022
BEST ANSWER: The tubes have blue LEDs under them so they have a pleasing glow
Don't remember the GU meter color as I sold it and replaced it with a 300B SET.
I really like that little amp especially with sensitive speakers e. g. Klipsch
Be aware the tubes are in the preamp section and the solid state amp section distors easily
Don't remember the GU meter color as I sold it and replaced it with a 300B SET.
I really like that little amp especially with sensitive speakers e. g. Klipsch
Be aware the tubes are in the preamp section and the solid state amp section distors easily
- Reply
- Inaccurate
- Barry D on Jan 2, 2022
- Purchased on Feb 16, 2021
BEST ANSWER: The tubes have blue LEDs under them so they have a pleasing glow
Don't remember the GU meter color as I sold it and replaced it with a 300B SET.
I really like that little amp especially with sensitive speakers e. g. Klipsch
Be aware the tubes are in the preamp section and the solid state amp section distors easily
Don't remember the GU meter color as I sold it and replaced it with a 300B SET.
I really like that little amp especially with sensitive speakers e. g. Klipsch
Be aware the tubes are in the preamp section and the solid state amp section distors easily
- Reply
- Inaccurate
- Barry D on Jan 2, 2022
- Purchased on Feb 16, 2021
The four tubes have blue LED illumination, as does the power button and the VU meter. The tubes themselves have an amber color. It appears to me that each tube has multiple small blue LEDs so that a blue ring appears from below.
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- Jason H on Jan 2, 2022
- Purchased on Sep 26, 2021
A nice blue color. I wanted to let you know this one's a little updated and you now can control the subwoofer amp output with the volume control. Before you could only control the volume from the subwoofer.
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- Loren A on Jan 2, 2022
- Purchased on Apr 14, 2020
Vu lights are blue,, tubes orange, bt signal orange.
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- DAVID B on Jan 3, 2022
- Purchased on Mar 12, 2021
Blue led from underneath and a little amber inside
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- Bill Mahar S on Jan 2, 2022
- Purchased on Sep 21, 2021
Mine are Blue, But I have seen others
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- Rodney K on Jan 2, 2022
- Purchased on Mar 11, 2021
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i want to use this amp with my turn table. I assume i plug the turn table into the "aux" imput? Since my turn table does not have a preamp, do i need one of those also? I thought the Tube stage of the amp was a preamp but now i'm wondering? Thanks in advance for your response.
New User U
on Jun 19, 2020
BEST ANSWER: More than likely you would/should need a preamp that has RIAA equalization. Since when the recording is mastered to the vinyl, there is not a flat EQ setting pressed to the phonograph disk. Type RIAA at wiki for the reason why.
The audio input on the back is for a line level CD player or MP3 player. These devices out put what should be going into an input that does not have the RIAA EQ. Back in the day, all Hi-Fi receivers had a dedicated Phono input with the RIAA curve built in, Now not so much! If you buy a preamp make sure that it has a RIAA EQ curve built in, otherwise your records will sound quite thin, no bass no boom!
The audio input on the back is for a line level CD player or MP3 player. These devices out put what should be going into an input that does not have the RIAA EQ. Back in the day, all Hi-Fi receivers had a dedicated Phono input with the RIAA curve built in, Now not so much! If you buy a preamp make sure that it has a RIAA EQ curve built in, otherwise your records will sound quite thin, no bass no boom!
- Reply
- Inaccurate
- David B on Jun 19, 2020
- Purchased on Oct 24, 2019
BEST ANSWER: More than likely you would/should need a preamp that has RIAA equalization. Since when the recording is mastered to the vinyl, there is not a flat EQ setting pressed to the phonograph disk. Type RIAA at wiki for the reason why.
The audio input on the back is for a line level CD player or MP3 player. These devices out put what should be going into an input that does not have the RIAA EQ. Back in the day, all Hi-Fi receivers had a dedicated Phono input with the RIAA curve built in, Now not so much! If you buy a preamp make sure that it has a RIAA EQ curve built in, otherwise your records will sound quite thin, no bass no boom!
The audio input on the back is for a line level CD player or MP3 player. These devices out put what should be going into an input that does not have the RIAA EQ. Back in the day, all Hi-Fi receivers had a dedicated Phono input with the RIAA curve built in, Now not so much! If you buy a preamp make sure that it has a RIAA EQ curve built in, otherwise your records will sound quite thin, no bass no boom!
- Reply
- Inaccurate
- David B on Jun 19, 2020
- Purchased on Oct 24, 2019
It is true that this is an “integrated” amplifier, meaning it is both a line-stage preamp and a power amp. But, it is not a phono preamp. Vinyl playback requires more gain in order to amplify the tiny voltages produced by the turntable’s cartridge. More importantly, a separate phono preamp has the proper equalization (the inverse RIAA curve) to accurately reproduce what was recorded on the vinyl. This is not included in this integrated amp, and vinyl playback will be overly bright and lack bass.
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- GAY R on Jun 19, 2020
- Purchased on Nov 8, 2019
Yes, you need a preamp for your turntable. Many modern turntables have one built in, but older ones don’t. The tube stage is a preamp—you have to go to the pure tube amp at mono price for tubes in the amp stage.
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- Sean W on Jun 19, 2020
- Purchased on Nov 11, 2019
You need a preamp. I got one that I can easily adjust and it works great. Love this unit. Looks cool and works really well. If it had a remote it would be perfect.
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- Randy H on Jun 19, 2020
- Purchased on Feb 9, 2020
According to our user manual you cannot use this on a turn table without a preamp. You can use it on a tv, mp3, DVD player or computer but that’s all.
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- Kellie C on Jun 19, 2020
- Purchased on Dec 28, 2019
This amplifier doesn't have a magnetic cartridge or a microphone type input so yes you will need that type of preamplifier.
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- Jeff S on Jun 19, 2020
- Purchased on Mar 24, 2020
You’re right that you need a phone preamp. The aux input is for a line level.
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- Kyle B on Jun 19, 2020
- Purchased on Jan 18, 2020
Yes, separate phono preamp is needed to use your turntable.
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- Michelle S on Jun 19, 2020
- Purchased on Apr 9, 2020
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What kind of speaker outputs are on this amp, can I use banana end cables? Thank you
Rob R
on Jan 4, 2022
BEST ANSWER: Yes, the left and right speaker outs are posts that are banana and bare wire friendly. The sub out is only line level though - it's RCA and mono.
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- Jonathan B on Jan 4, 2022
- Purchased on Dec 13, 2021
BEST ANSWER: Yes, the left and right speaker outs are posts that are banana and bare wire friendly. The sub out is only line level though - it's RCA and mono.
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- Jonathan B on Jan 4, 2022
- Purchased on Dec 13, 2021
It has multiformat speaker terminals. Yes, it accepts banana terminals or simply stripped wires.
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- Maurice F on Jan 6, 2022
- Purchased on Dec 24, 2021
Yes! This awesome tube amp has banana plug connectors. They also accept bare wire. Enjoy!
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- Lynn on Jan 4, 2022
- Purchased on Oct 18, 2021
Yes. Speaker outputs are standard 5 way binding posts which do accommodate banana plugs.
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- Jon H on Jan 4, 2022
- Purchased on Dec 19, 2021
Bare wire or banana plugs work.
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- Daniel S on Jan 6, 2022
- Purchased on Dec 24, 2021
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Has anyone been able to successfully make their subwoofer work with this amp? the amp has 2 subout ports. do i use those ports as Left / Right ports or do i use a y cable to connect to one of the ports and then the left / right on my subwoofer? Why does it have 2 SUBOUT ports? both are "red" and not the traditional red / white for Left / right ports.
New User U
on Jul 5, 2020
BEST ANSWER: Just received the latest? version. There is now a single subwoofer output and they have added a phono input. There is no mention in the manual whether the phono input is RIAA or if it is a line input (requiring a preamp in the phonograph player,
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- Inaccurate
- New User U on Aug 3, 2022
- Purchased on Jul 30, 2022
BEST ANSWER: Just received the latest? version. There is now a single subwoofer output and they have added a phono input. There is no mention in the manual whether the phono input is RIAA or if it is a line input (requiring a preamp in the phonograph player,
- Reply
- Inaccurate
- New User U on Aug 3, 2022
- Purchased on Jul 30, 2022
There is only one output on the amp, and my sub has a L/R input, but one of them is also a mono input, so I used a single RCA cable to connect from the amp to the sub.
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- Inaccurate
- Keith S on Jun 9, 2021
- Purchased on Feb 14, 2021
I used the RCA connect and plugged 1 into the port. And the other to the sub out on the amp. As per the instructions use the red to red. Works great.
- Reply(1)
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- Carlos A on Jul 5, 2020
- Purchased on Apr 24, 2020
THANK YOU for your response and your help. It was your answer that allowed me to fix my issue. I connected mine exactly as you said you connected yours and it works. !!!
- Reply
- New User U on Jul 6, 2020
This little Monoprice RCA Plug to 2x RCA Jack Splitter Adapter, Gold Plated, did the trick.
Monoprice RCA Plug to 2x RCA Jack Splitter Adapter, Gold Plated
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- Inaccurate
- Jin Q on Jul 5, 2020
- Purchased on Jun 3, 2020
It really shouldn't matter, since its the subwoofer. There is no traditional left or right.
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- Inaccurate
- Richard C on Jul 5, 2020
- Purchased on May 20, 2020
Thanks for your answer and your help with my issue.
- Reply
- New User U on Jul 6, 2020
I use it as a l/r but it also works as a mono out of either one of the ports
- Reply(2)
- Inaccurate
- Ted C on Jul 5, 2020
- Purchased on May 6, 2020
thanks i appreciate your time for the answer.
- Reply
- New User U on Jul 6, 2020
thanks for your help and answer.
- Reply
- New User U on Jul 6, 2020
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Are all 4 tubes suppose to light up? We are hearing static when playing a cd and the 2 middle tubes are not lit up
A shopper
on Sep 12, 2020
BEST ANSWER: Yes, all tubes light up - some brighter than others. Depends on how much is running through each channel. The problem could be your RCA cords from the playback device to the amplifier. Those cords will hummm if not good cords. Spend some money on good RCA cords, and make sure your turntable is grounded. There should be absolutely no hummm.
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- Douglas M on Sep 12, 2020
- Purchased on Jul 18, 2020
BEST ANSWER: Yes, all tubes light up - some brighter than others. Depends on how much is running through each channel. The problem could be your RCA cords from the playback device to the amplifier. Those cords will hummm if not good cords. Spend some money on good RCA cords, and make sure your turntable is grounded. There should be absolutely no hummm.
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- Inaccurate
- Douglas M on Sep 12, 2020
- Purchased on Jul 18, 2020
Yes they are. The center tubes are the “power tubes”. Does the static vary when volume is changed? Using a bit of cloth so as not to touch the tubes with bare skin do they push done? Push lightly not too forcefully. Please advise on this. I can advise further.
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- Inaccurate
- Carlos A on Sep 15, 2020
- Purchased on Apr 24, 2020
Yes. All 4 tubes should glow. You can try gently pulling the tubes straight up and reinserting them. Maybe reseating will help them make proper contact.
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- Inaccurate
- jeff m on Sep 12, 2020
- Purchased on Nov 10, 2019
All four tubes light up on mine.
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- Bert Schultz on Sep 12, 2020
- Purchased on Jun 3, 2020
Yes, all of the tubes light up.
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- Joseph D on Sep 13, 2020
- Purchased on May 21, 2020
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My turntable has a preamp built in (AT-LP5X). There is another question below that states I need a preamp. Will the internal preamp work or will i have a flat sound lacking bass? What other product should I use?
New User U
on Feb 1, 2022
BEST ANSWER: The built in phono preamp will work with this amplifier, just make sure the switch is on the line out position to connect your turntable to any external device that doesn't have it's own phono preamp input.If you're interested in what your turntable is capable of producing musically then I would invest in an external phono preamp to fully bring out the nuances of whatever cartridge you're using. The cartridge along with the phono preamp have the biggest impact on the sound quality of a turntable's performance
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- Inaccurate
- Brady H on Feb 1, 2022
- Purchased on Feb 5, 2021
BEST ANSWER: The built in phono preamp will work with this amplifier, just make sure the switch is on the line out position to connect your turntable to any external device that doesn't have it's own phono preamp input.If you're interested in what your turntable is capable of producing musically then I would invest in an external phono preamp to fully bring out the nuances of whatever cartridge you're using. The cartridge along with the phono preamp have the biggest impact on the sound quality of a turntable's performance
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- Inaccurate
- Brady H on Feb 1, 2022
- Purchased on Feb 5, 2021
Your turntable's built in preamp will work to connect it to this amplifier. Just make sure it's in the line out position for connecting it to any external receiver or amplifier that doesn't have a dedicated phono input. I use an external vacuum tube phono preamp that's has better phono equalization and filtering than the one that's built into mine
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- Inaccurate
- Brady H on Feb 1, 2022
- Purchased on Feb 5, 2021
If your turntable has a built-in phono pre-amp, all you need to do is to connct it's output to the AUX IN of the amplifier and you should be just fine.
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- Inaccurate
- CHINENYE A on Feb 3, 2022
- Purchased on Jan 18, 2022
The internal preamp should work well. Just connect to the Audio input RCA sockets. If your turntable has a pre-amp switch, be sure it is switched on.
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- Rodney K on Feb 1, 2022
- Purchased on Mar 11, 2021
If it already has a preamp built in you shouldn't need another additional one.
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- SCOTT D on Feb 1, 2022
- Purchased on Mar 14, 2021
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Can the amp be used on British mains voltage of 240v?
A shopper
on Jan 6, 2023
BEST ANSWER: The input voltage is specified in the users manual,as follows.
100-120/220-240V AC 50/60Hz so the,answer would be yes it can be used on British mains of 240V AC 50Hz. The input on the back for power is a standard IEC connection like a computer so you would need to acquire,a power supply cable configured to Brit outlet format.
100-120/220-240V AC 50/60Hz so the,answer would be yes it can be used on British mains of 240V AC 50Hz. The input on the back for power is a standard IEC connection like a computer so you would need to acquire,a power supply cable configured to Brit outlet format.
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- Inaccurate
- Russell S on Jan 6, 2023
- Purchased on May 23, 2022
BEST ANSWER: The input voltage is specified in the users manual,as follows.
100-120/220-240V AC 50/60Hz so the,answer would be yes it can be used on British mains of 240V AC 50Hz. The input on the back for power is a standard IEC connection like a computer so you would need to acquire,a power supply cable configured to Brit outlet format.
100-120/220-240V AC 50/60Hz so the,answer would be yes it can be used on British mains of 240V AC 50Hz. The input on the back for power is a standard IEC connection like a computer so you would need to acquire,a power supply cable configured to Brit outlet format.
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- Inaccurate
- Russell S on Jan 6, 2023
- Purchased on May 23, 2022
I’m an electrician in the US and if this amplifier is rated for 120volts it will not work plugging into their 240 volt receptacles. They make power inverters.that can be bought but typically very pricy and not practical. The wiring specs for this amplifier is only rated for 120 volts
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- THOMAS N on Jan 7, 2023
- Purchased on May 26, 2022
no, you need a transformer to convert the voltage, just as with other electronics designed for the US market which uses 110v service
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- Richard S on Jan 25, 2023
- Purchased on Jan 1, 2023
There is a sticker on the back stating 110V, and there is no switch to select 240v, so it appears it cannot be used on 240v.
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- Alan F on Jan 7, 2023
- Purchased on Feb 12, 2022
No, not without a step down transformer, it made to operate on U.S. 120 Volt main.
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- CHINENYE A on Jan 6, 2023
- Purchased on Jan 18, 2022
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Can this be Bridged for mono output?
A shopper
on Jan 20, 2020
BEST ANSWER: Thank you for your question.
This amp would not allow you to bridge the outputs.
This amp would not allow you to bridge the outputs.
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- Tyler C Staff on Jan 21, 2020
BEST ANSWER: Thank you for your question.
This amp would not allow you to bridge the outputs.
This amp would not allow you to bridge the outputs.
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- Tyler C Staff on Jan 21, 2020
This little receiver doesn’t have main in or pre out connects, so it might not work like you want it to. No way to bridge other than splitting a channel from your source and running it to the left and right inputs. Output would still be two speaker terminals.
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- Sean W on Jan 21, 2020
- Purchased on Nov 11, 2019
In typical bridging, the inputs are paralleled, l & r (+) spkr outputs are connected to a single spkr load. 2 amps would be required for stereo... I'm interested to hear if these little amps can be bridged.
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- Thomas W on May 26, 2020
Since it has a left and right channel I don’t know how you would do that.....
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- Kellie C on Jan 20, 2020
- Purchased on Dec 28, 2019
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i cant seem to pair any device with my 38360 , can you help?
A shopper
on Nov 29, 2021
BEST ANSWER: For me, the device doesn’t even say it’s in pairing mode. I would try restarting your Bluetooth, forgetting the device if you can, or restarting your phone. It wouldn’t surprise me if your Bluetooth is malfunctioning, problems seem common in these devices
- Reply
- Inaccurate
- Christopher G on Nov 29, 2021
- Purchased on Nov 9, 2021
BEST ANSWER: For me, the device doesn’t even say it’s in pairing mode. I would try restarting your Bluetooth, forgetting the device if you can, or restarting your phone. It wouldn’t surprise me if your Bluetooth is malfunctioning, problems seem common in these devices
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- Christopher G on Nov 29, 2021
- Purchased on Nov 9, 2021
Hi mine took a few tries also but it works perfectly now. I'm very happy with it. Are you playing and pairing with your phone? I'm sure you have bluetooth on. I hope I helped. Best Fred
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- Federico R on Nov 29, 2021
- Purchased on Nov 1, 2021
I received the equipment though I never received any shipping info prior to it coming. I feared my order had not gone through but apparently, it had. Thanks for checking.
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- Mr and Mrs Mark K on Dec 15, 2021
- Purchased on Nov 21, 2021
I tried with CD player and an external DAC with optical and RCA inputs, both are not working, only blue tooth connection worked
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- David C on Nov 30, 2021
- Purchased on Nov 16, 2021
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Is it really Bluetooth 2.0 like it says in the specs? Wouldn't that be a downgrade from the previous model?
Adam A
on Oct 25, 2019
BEST ANSWER: Maybe just as important, my box issues a BT PLAY automatically upon pairing, whether you are playing BT or not, and regardless of the position of the input select switch. You BT source maybe draining battery for nothing. No fix for IOS 13, but I hear a fix for Androids.
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- William C on Dec 8, 2019
BEST ANSWER: Maybe just as important, my box issues a BT PLAY automatically upon pairing, whether you are playing BT or not, and regardless of the position of the input select switch. You BT source maybe draining battery for nothing. No fix for IOS 13, but I hear a fix for Androids.
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- William C on Dec 8, 2019
I heard from Monoprice support and they said that yes, it's Bluetooth 2.1 + EDR. This seems like a huge step backwards and is the reason that I will not be purchasing this item.
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- jason z on Oct 28, 2019
Sub Out to Line In should work, very odd that it doesn't. Can always hook up Speakers Out to Speaker Lever In. Set your Low Pass Filter to ~80hz?
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- William C on Dec 18, 2019
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I have the Monoprice 8" powered subwoofer and have the speaker connected to the RCA sub out ports of this unit, but the line output does not vary with the amplifier volume. Is this how it's supposed to work? Can't imagine it being very useful if the volume needs to be adjusted on the sub every time the volume is changed on the amplifier.
New User U
on Dec 10, 2019
Monoprice 25 Watt Stereo Hybrid Tube Amplifier with Bluetooth, Optical, Coaxial, and USB Inputs, and Subwoofer Out
Monoprice SSW-8 8in 100-Watt Powered Slim Subwoofer
BEST ANSWER: First thing to clarify is that the RCA connectors on the sub are Line In ports, not sub out ports. The question that needs to be answered is to what port on your amplifier do you have the RCA connectors on the sub connected?
You have three choices that will provide amplifier volume adjustments to the sub.
1) If your amplifier has a Sub Out jack, I suggest you use that. Typically the sub out jack on an amplifier is a single RCA connector. If this is your case, then you should use a splitter cable so you can connect to both of the RCA connectors on the sub. Using the sub out port on your amplifier will send only low frequencies to the sub (according the the specifications of your amplifier). If you use this method, then you should NOT use the speaker outputs on the sub to connect to your main L & R speakers. For me, this is the preferred method.
2) The second method you can use, is to connect your main L & R speaker outputs from your amplifier to the RCA Line In connectors on the sub. You can use this method both if your amplifier HAS a sub out connector, and if your amplifier DOES NOT have a sub out connector. In this case, you can connect your main L & R speakers to the speaker connectors on the sub because the sub will be receiving a full spectrum signal from your amp, although you don't have to. You can still connect the main L & R speakers apart from the sub.
3) The third method can be used if your amplifier does NOT have a sub out connector and yo do not want to connect the Main L & R speaker outputs to the sub. In this case, use the Tape Out connectors (or any Record Out connectors) on your amplifier to connect to the Line In RCA ports on the sub. This will provide Line level volume control to the sub.
All three of these methods should provide line level volume control to the sub that will adjust up and down along with the L & R speakers. I hope this helps.
You have three choices that will provide amplifier volume adjustments to the sub.
1) If your amplifier has a Sub Out jack, I suggest you use that. Typically the sub out jack on an amplifier is a single RCA connector. If this is your case, then you should use a splitter cable so you can connect to both of the RCA connectors on the sub. Using the sub out port on your amplifier will send only low frequencies to the sub (according the the specifications of your amplifier). If you use this method, then you should NOT use the speaker outputs on the sub to connect to your main L & R speakers. For me, this is the preferred method.
2) The second method you can use, is to connect your main L & R speaker outputs from your amplifier to the RCA Line In connectors on the sub. You can use this method both if your amplifier HAS a sub out connector, and if your amplifier DOES NOT have a sub out connector. In this case, you can connect your main L & R speakers to the speaker connectors on the sub because the sub will be receiving a full spectrum signal from your amp, although you don't have to. You can still connect the main L & R speakers apart from the sub.
3) The third method can be used if your amplifier does NOT have a sub out connector and yo do not want to connect the Main L & R speaker outputs to the sub. In this case, use the Tape Out connectors (or any Record Out connectors) on your amplifier to connect to the Line In RCA ports on the sub. This will provide Line level volume control to the sub.
All three of these methods should provide line level volume control to the sub that will adjust up and down along with the L & R speakers. I hope this helps.
- Reply(1)
- Inaccurate
- Quiller C on Dec 11, 2019
This amp has 2 sub out ports. do i use both subout ports or do i use a y splitter and only plug into one of the subout ports on the AMP? How do i connect my subwoofer to this amp?
- Reply (1)
- New User U on Jul 5, 2020
If you have a sub with L and R Sub-In ports then connect both to your L and R Sub-out ports on the amp. If your sub has only one Sub-in port then use a Y connector on the sub and both Sub-out ports on the amp.
But that's the problem. the 2 ports on the amp are not labled L or R and both of them are RED. not one red one white.
- Reply (1)
- New User U on Jul 5, 2020
What amp do you have? This conversation links to the Monoprice 25 Watt Tube Amp. The connections on that amp look like they are both black, but look to me that one is L and one is R. Sub out on an amp should have volume control. I should ask what is the use? Music? If music, then using the speaker outputs of the amp to the speaker inputs on the sub would be best.
thanks for your answers and your time. i finally took a chance and got it working. i hooked one RCA cable to one of the subout ports on the amp and the RED input port on the subwoofer. it works BUT of course no volume on the subwoofer from the amp volume adjustment to fixing that is my next step.
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- New User U on Jul 6, 2020
BEST ANSWER: First thing to clarify is that the RCA connectors on the sub are Line In ports, not sub out ports. The question that needs to be answered is to what port on your amplifier do you have the RCA connectors on the sub connected?
You have three choices that will provide amplifier volume adjustments to the sub.
1) If your amplifier has a Sub Out jack, I suggest you use that. Typically the sub out jack on an amplifier is a single RCA connector. If this is your case, then you should use a splitter cable so you can connect to both of the RCA connectors on the sub. Using the sub out port on your amplifier will send only low frequencies to the sub (according the the specifications of your amplifier). If you use this method, then you should NOT use the speaker outputs on the sub to connect to your main L & R speakers. For me, this is the preferred method.
2) The second method you can use, is to connect your main L & R speaker outputs from your amplifier to the RCA Line In connectors on the sub. You can use this method both if your amplifier HAS a sub out connector, and if your amplifier DOES NOT have a sub out connector. In this case, you can connect your main L & R speakers to the speaker connectors on the sub because the sub will be receiving a full spectrum signal from your amp, although you don't have to. You can still connect the main L & R speakers apart from the sub.
3) The third method can be used if your amplifier does NOT have a sub out connector and yo do not want to connect the Main L & R speaker outputs to the sub. In this case, use the Tape Out connectors (or any Record Out connectors) on your amplifier to connect to the Line In RCA ports on the sub. This will provide Line level volume control to the sub.
All three of these methods should provide line level volume control to the sub that will adjust up and down along with the L & R speakers. I hope this helps.
You have three choices that will provide amplifier volume adjustments to the sub.
1) If your amplifier has a Sub Out jack, I suggest you use that. Typically the sub out jack on an amplifier is a single RCA connector. If this is your case, then you should use a splitter cable so you can connect to both of the RCA connectors on the sub. Using the sub out port on your amplifier will send only low frequencies to the sub (according the the specifications of your amplifier). If you use this method, then you should NOT use the speaker outputs on the sub to connect to your main L & R speakers. For me, this is the preferred method.
2) The second method you can use, is to connect your main L & R speaker outputs from your amplifier to the RCA Line In connectors on the sub. You can use this method both if your amplifier HAS a sub out connector, and if your amplifier DOES NOT have a sub out connector. In this case, you can connect your main L & R speakers to the speaker connectors on the sub because the sub will be receiving a full spectrum signal from your amp, although you don't have to. You can still connect the main L & R speakers apart from the sub.
3) The third method can be used if your amplifier does NOT have a sub out connector and yo do not want to connect the Main L & R speaker outputs to the sub. In this case, use the Tape Out connectors (or any Record Out connectors) on your amplifier to connect to the Line In RCA ports on the sub. This will provide Line level volume control to the sub.
All three of these methods should provide line level volume control to the sub that will adjust up and down along with the L & R speakers. I hope this helps.
- Reply(1)
- Inaccurate
- Quiller C on Dec 11, 2019
This amp has 2 sub out ports. do i use both subout ports or do i use a y splitter and only plug into one of the subout ports on the AMP? How do i connect my subwoofer to this amp?
- Reply (1)
- New User U on Jul 5, 2020
If you have a sub with L and R Sub-In ports then connect both to your L and R Sub-out ports on the amp. If your sub has only one Sub-in port then use a Y connector on the sub and both Sub-out ports on the amp.
But that's the problem. the 2 ports on the amp are not labled L or R and both of them are RED. not one red one white.
- Reply (1)
- New User U on Jul 5, 2020
What amp do you have? This conversation links to the Monoprice 25 Watt Tube Amp. The connections on that amp look like they are both black, but look to me that one is L and one is R. Sub out on an amp should have volume control. I should ask what is the use? Music? If music, then using the speaker outputs of the amp to the speaker inputs on the sub would be best.
thanks for your answers and your time. i finally took a chance and got it working. i hooked one RCA cable to one of the subout ports on the amp and the RED input port on the subwoofer. it works BUT of course no volume on the subwoofer from the amp volume adjustment to fixing that is my next step.
- Reply
- New User U on Jul 6, 2020
This is truly a problem of the amplifier, not the subwoofer. However one can avoid this problem by using speaker line in with a little more complicated connection.
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- Yuechen Z on Dec 10, 2019
- Purchased on Nov 29, 2019
How exactly did you connect your subwoofer using the ports on the back of this amp? Do i use BOTH ports or do i use a y splitter to connect my subwoofer? both of the ports on the back are red. not one red and one white.
- Reply(1)
- Inaccurate
- New User U on Jul 5, 2020
- Purchased on Jun 13, 2020
The sub-out on this amplifier does not vary with the speaker volume at all. It's a problem.
- Reply
- Benjamin C on Jul 22, 2020
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can I plug in my sub woofer out of my car to this and sound good?
A shopper
on Dec 21, 2019
BEST ANSWER: That does not seem to be an ideal hook up scenario.
- Reply
- Inaccurate
- New User U Staff on Dec 21, 2019
BEST ANSWER: That does not seem to be an ideal hook up scenario.
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- New User U Staff on Dec 21, 2019
There is no way to know until u try. Your sub of course must be self-powered, and being from a car, it will require a beefy 12V supply, and has a crossover knob, because this amp can't power a passive subs nor does it have built-in bass management. All-in-all, a chore, but is possible.
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- William C on Dec 27, 2019
I would not recomend it as you would need a seperate sub amp unless you have a powered amp, then you would also need a 12 volt transformer. All this can be done but would defeat the purpose of a minimalistic retro look. Try getting a home sub i use a dayton audio and i love it.
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- Marvin L on Dec 21, 2019
- Purchased on Dec 2, 2019
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Does this updated unit use the same tubes as the original hybrid? I have upgraded tubes that made that unit sound amazing. An accidental crossing of wires caused one channel to blow out. I'm thinking about possibly buying this 2019 version (sub outs a great add) and I'd like to know if this 2019 upgrade is using the same tubes. This would mean I can roll in my upgraded tubes and feel confident there won't be any issues.
New User U
on Feb 8, 2020
Monoprice 25 Watt Stereo Hybrid Tube Amplifier with Bluetooth, Optical, Coaxial, and USB Inputs, and Subwoofer Out
Monoprice 25 Watt Stereo Hybrid Tube Amplifier with Bluetooth
BEST ANSWER: Sorry to hear about your problem with the first amplifier - mine has been performing perfectly, even with the stock tubes. The new model with it's added features looks like a terrific buy. I'd proceed cautiously, though. The "original" used 6N1 tubes in the preamp section and 6P15 in the power output section - I assume Chinese made. The product listing for the upgraded model does not specify the tube set - there's no assurance that your current upgraded tubes will be a safe or usable replacement for the stock tubes. When engineers design new features in a product it gives them the opportunity improve upon what they designed the first time - tubes included. See if you can get clarification from the product support people at Monoprice regarding the tubes in the upgraded model. Also, confirm that the unit is self-biasing when it come to tube bias - I'll assume it is, as with the original. Tube biasing in hi-fi equipment is a more critical issue than it is in guitar amps. For $134, with those features, it's a great deal - and your original is fried. I won't worry too much if your upgraded tubes are a lost investment. If you buy the new unit, do your homework, and know what your replacing. Best of luck!
- Reply(1)
- Inaccurate
- DENIS R S on Feb 9, 2020
Thanks for your reply. I did more searches for info on the site. The tubes are different on the two units. I searched for equivalent tubes or adaptors, but it’s not going to work.
So I’ve let go of this model. I may just buy a new one of the original.
Thanks again
So I’ve let go of this model. I may just buy a new one of the original.
Thanks again
- Reply
- New User U on Mar 12, 2020
BEST ANSWER: Sorry to hear about your problem with the first amplifier - mine has been performing perfectly, even with the stock tubes. The new model with it's added features looks like a terrific buy. I'd proceed cautiously, though. The "original" used 6N1 tubes in the preamp section and 6P15 in the power output section - I assume Chinese made. The product listing for the upgraded model does not specify the tube set - there's no assurance that your current upgraded tubes will be a safe or usable replacement for the stock tubes. When engineers design new features in a product it gives them the opportunity improve upon what they designed the first time - tubes included. See if you can get clarification from the product support people at Monoprice regarding the tubes in the upgraded model. Also, confirm that the unit is self-biasing when it come to tube bias - I'll assume it is, as with the original. Tube biasing in hi-fi equipment is a more critical issue than it is in guitar amps. For $134, with those features, it's a great deal - and your original is fried. I won't worry too much if your upgraded tubes are a lost investment. If you buy the new unit, do your homework, and know what your replacing. Best of luck!
- Reply(1)
- Inaccurate
- DENIS R S on Feb 9, 2020
Thanks for your reply. I did more searches for info on the site. The tubes are different on the two units. I searched for equivalent tubes or adaptors, but it’s not going to work.
So I’ve let go of this model. I may just buy a new one of the original.
Thanks again
So I’ve let go of this model. I may just buy a new one of the original.
Thanks again
- Reply
- New User U on Mar 12, 2020
What tubes did you use to upgrade, and did they work in the newer model? I am looking to upgrade mine as well.
- Reply
- Inaccurate
- Mat M on Oct 7, 2022
- Purchased on Sep 28, 2022
Don't know if the tubes are identical, but if the wastage is the same, it should work...
- Reply
- Inaccurate
- Nick B on Feb 8, 2020
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How can I connect a computer's usb out put to the amplifier?
A shopper
on Jun 27, 2020
BEST ANSWER: The USB port on your PC is not an output. USB connections can only have one host, the ports on the amp and on your PC are hosts, so even if you had a cable to connect the two, they would not work. You will need to connect your PC via optical, digital (RCA connector) or by getting a headphone to RCA converter.
- Reply
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- Mat M on Oct 5, 2022
- Purchased on Sep 28, 2022
BEST ANSWER: The USB port on your PC is not an output. USB connections can only have one host, the ports on the amp and on your PC are hosts, so even if you had a cable to connect the two, they would not work. You will need to connect your PC via optical, digital (RCA connector) or by getting a headphone to RCA converter.
- Reply
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- Mat M on Oct 5, 2022
- Purchased on Sep 28, 2022
There is a front usb socket on the left side of front panel.
- Reply
- Inaccurate
- Rodney K on Sep 12, 2021
- Purchased on Mar 11, 2021
USB socket on left Side of front panel
- Reply
- Inaccurate
- Rodney K on Sep 12, 2021
- Purchased on Mar 11, 2021
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Is the amplification class AB ?
A shopper
on Jul 20, 2020
BEST ANSWER: Yes, it is a class AB Amplifier
- Reply
- Inaccurate
- BERT A M on Jul 20, 2020
- Purchased on Mar 22, 2020
BEST ANSWER: Yes, it is a class AB Amplifier
- Reply
- Inaccurate
- BERT A M on Jul 20, 2020
- Purchased on Mar 22, 2020
I checked the circle, it is two (left and right) channels, each channel is a Class A amplifier
- Reply
- Inaccurate
- Yuechen Z on Jul 20, 2020
- Purchased on Nov 29, 2019
class B, I think. Class B has to be symmetry, and class A does not.
- Reply
- Inaccurate
- Yuechen Z on Jul 20, 2020
- Purchased on Nov 29, 2019
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I have vintage 16 ohm 25 watt speaker cabinets. Can I run this amp at 16 ohms per channel?
Nicholas D
on Jan 21, 2023
BEST ANSWER: Usually lower than the standard 8 ohms are more challenging to drive because of increased current demands . I run 6 ohm speakers no problem so I’d think 16 ohm would be easy.
- Reply
- Inaccurate
- Lasers For Surgery I on Jan 22, 2023
- Purchased on Oct 9, 2022
BEST ANSWER: Usually lower than the standard 8 ohms are more challenging to drive because of increased current demands . I run 6 ohm speakers no problem so I’d think 16 ohm would be easy.
- Reply
- Inaccurate
- Lasers For Surgery I on Jan 22, 2023
- Purchased on Oct 9, 2022
Yes, according to the specs in the user manual, output impedance is 4-16 ohms.
- Reply
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- Fausto on Jan 21, 2023
- Purchased on Nov 27, 2022
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How long do the tubes last?
A shopper
on Sep 6, 2023
BEST ANSWER: I have it for one year now and use it as my computer speaker set up ( so every day ) and still no problems .
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- stanislav jasic co U on Sep 6, 2023
- Purchased on Sep 11, 2022
BEST ANSWER: I have it for one year now and use it as my computer speaker set up ( so every day ) and still no problems .
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- stanislav jasic co U on Sep 6, 2023
- Purchased on Sep 11, 2022
I’ve had my amp for over two years and it’s working as good as it did on day-1.
- Reply
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- Matt R on Sep 6, 2023
- Purchased on Sep 28, 2022
Mine is over two years and still going strong.
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- Bob L on Sep 6, 2023
- Purchased on Sep 28, 2022
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Can i connect a preamp to it, and bypass its inner preamp. Use it as a power amp only.?
A shopper
on Sep 16, 2023
BEST ANSWER: No, the pre-amp is directly connected internally to the final stage amplifier.
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- Richard B on Sep 17, 2023
- Purchased on Jan 21, 2023
BEST ANSWER: No, the pre-amp is directly connected internally to the final stage amplifier.
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- Richard B on Sep 17, 2023
- Purchased on Jan 21, 2023
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If sub output is utilized, the low/bass frequency is cut off from the front/main speaker output? N what is the crossover frequency for the sub to main channels? Thanks
A shopper
on Sep 27, 2019
BEST ANSWER: It seems to be a line level output without cut-over. Also the volume doesn't doesn't vary with the speaker volume either, turn the speakers down so far to be silent the sub will sit there booming by itself, turn the speakers all the way up the base is drowned out.
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- Benjamin C on Jul 22, 2020
- Purchased on Jul 16, 2020
BEST ANSWER: It seems to be a line level output without cut-over. Also the volume doesn't doesn't vary with the speaker volume either, turn the speakers down so far to be silent the sub will sit there booming by itself, turn the speakers all the way up the base is drowned out.
- Reply
- Inaccurate
- Benjamin C on Jul 22, 2020
- Purchased on Jul 16, 2020
Don't hold me to it but based on price point and general feedbacks of this unit, I wager you don't get sophisticated base management control on this puppy. I wager full rage output on both, and relies on your sub to do the cross-over.
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- Inaccurate
- William C on Nov 23, 2019
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Can I use with my speakers which are rated for 8 ohms? Am confused by the specifications which say 4~16 ohms with a ? next to it.
A shopper
on Dec 8, 2019
The "4~16" means the amp is rated to work with speakers with 4 through 16 ohm ratings, although I see no reason you can't go higher since it only reduces the power output and lessens the load on the amp. However, going lower forces the amp to push more wattage than it's designed for.
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- Mat M on Oct 5, 2022
- Purchased on Sep 28, 2022
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does this tube amp have a remote control?
A shopper
on Feb 4, 2020
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If I use this unit only for a media streamer with toslink, am I actually using the tubes?
A shopper
on Feb 16, 2020
BEST ANSWER: Yes. AFAIK, any output you get from this unit will be processed/colored by the tubes. I can't speak for the headphone output. I'm using the TOSLINK from my computer mobo, it's colored pretty warm and pushes my cheap home theater speakers well.
- Reply
- Inaccurate
- Jonathan B on Jan 4, 2022
- Purchased on Dec 13, 2021
BEST ANSWER: Yes. AFAIK, any output you get from this unit will be processed/colored by the tubes. I can't speak for the headphone output. I'm using the TOSLINK from my computer mobo, it's colored pretty warm and pushes my cheap home theater speakers well.
- Reply
- Inaccurate
- Jonathan B on Jan 4, 2022
- Purchased on Dec 13, 2021
There is an internal D/A converter that turns the digital signals (toslink, bluetooth, coax) into analog, which are then amplified by the amplifier section (tubes).
- Reply
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- Mat M on Oct 5, 2022
- Purchased on Sep 28, 2022
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Should this power my 100w subwoofer? I get no sound through the sub and googling just tells me to reset the receiver which I don't see how to do.
A shopper
on Feb 29, 2020
BEST ANSWER: I'm sorry to hear that, please feel free to contact our tech support team with a detailed summary of the issue you are experiencing.
Please contact us at [email protected] and our knowledgeable Technical Support staff would be more than happy to assist.
Thank you.
Please contact us at [email protected] and our knowledgeable Technical Support staff would be more than happy to assist.
Thank you.
- Reply
- Inaccurate
- Tyler C Staff on Mar 2, 2020
BEST ANSWER: I'm sorry to hear that, please feel free to contact our tech support team with a detailed summary of the issue you are experiencing.
Please contact us at [email protected] and our knowledgeable Technical Support staff would be more than happy to assist.
Thank you.
Please contact us at [email protected] and our knowledgeable Technical Support staff would be more than happy to assist.
Thank you.
- Reply
- Inaccurate
- Tyler C Staff on Mar 2, 2020
did you ever figure out how to make your subwoofer work with this amp? it has 2 subout ports on the back. do i use both ports as "LEFT" and "RIGHT" or do i use a y splitter to connect to only one port and then connect the other end of the RCA cables to my RCA inputs on the subwoofer?
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- Inaccurate
- New User U on Jul 5, 2020
- Purchased on Jun 13, 2020
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Can this amp be used as a pre amp only, without hooking speakers. I would like to use it for the Bluetooth and optical toslink from the TV, and send the signal to my main amp? Also what type of DAC does this unit have?
A shopper
on Jun 9, 2020
You would have to get a line level to RCA converter to use it that way; taking the amps output (speaker/line level) to RCA (low level).
- Reply
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- Mat M on Oct 5, 2022
- Purchased on Sep 28, 2022
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Has anyone actually connected a subwoofer to this amp and had it work? IF SO, how did you do it using the "sub out" port. Also why are there 2 subouts? do both of them connect to one subwoofer? do i use an RCA y cable to connect? how exactly do i use the sub out ports to connect my subwoofer? I have contacted support with this question and all i got was an email directing me to the PDF of the manual which has NOTHING about how to connect the subwoofer.
Thanks in advance for your responses.
Thanks in advance for your responses.
New User U
on Jul 1, 2020
BEST ANSWER: Yes, I used a single RCA cable from one of the outputs on the amp into the mono input (L) of my powered subwoofer. It works great
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- Inaccurate
- Keith S on Aug 10, 2021
- Purchased on Feb 14, 2021
BEST ANSWER: Yes, I used a single RCA cable from one of the outputs on the amp into the mono input (L) of my powered subwoofer. It works great
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- Keith S on Aug 10, 2021
- Purchased on Feb 14, 2021
I was able to connect it to a sub. If your sub has one input then yes, you'd use an RCA Y cable to connect.
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- JON M on Aug 10, 2021
- Purchased on Feb 14, 2021
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Can I use this amplifier with a pair of Monolith K-bas?
A shopper
on Dec 1, 2020
BEST ANSWER: Based on the specifications, it looks like they would be a good match. The ported design should work well with this amplifier.
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- Inaccurate
- BERT A M on Dec 2, 2020
- Purchased on Mar 22, 2020
BEST ANSWER: Based on the specifications, it looks like they would be a good match. The ported design should work well with this amplifier.
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- BERT A M on Dec 2, 2020
- Purchased on Mar 22, 2020
I believe so. You are going to enjoy the sound of this unit.
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- Kyu P on Dec 1, 2020
- Purchased on Apr 8, 2020
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Will it power headphones like the DT880/DT990 600 ohm?
A shopper
on Dec 3, 2020
BEST ANSWER: Yes. I currently use the headphone 1/8" output to my Home Theater AVR or Surround Sound Amplifier. It sounds GREAT! THANK YOU for your question happy I could help.
God Bless,
Timothy
God Bless,
Timothy
- Reply
- Inaccurate
- Wanda Whitlock / Tim G on Dec 4, 2020
- Purchased on Oct 9, 2020
BEST ANSWER: Yes. I currently use the headphone 1/8" output to my Home Theater AVR or Surround Sound Amplifier. It sounds GREAT! THANK YOU for your question happy I could help.
God Bless,
Timothy
God Bless,
Timothy
- Reply
- Inaccurate
- Wanda Whitlock / Tim G on Dec 4, 2020
- Purchased on Oct 9, 2020
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Can the unit be used as a power amp ?
Darren F
on Dec 14, 2020
BEST ANSWER: Yes 25watts per channel in stereo. Use efficient speaks and don’t expect the walls to shake.
- Reply
- Inaccurate
- Gary M on Dec 14, 2020
- Purchased on Nov 29, 2020
BEST ANSWER: Yes 25watts per channel in stereo. Use efficient speaks and don’t expect the walls to shake.
- Reply
- Inaccurate
- Gary M on Dec 14, 2020
- Purchased on Nov 29, 2020
It IS a power amplifier, with 25 Watts output.
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- shark92651 on Dec 14, 2020
- Purchased on Nov 29, 2020
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when connecting a subwoofer to this amp, does the volume control on the amp, also control the subwoofer volume?
luis c
on May 23, 2021
BEST ANSWER: Yes and no, these units rely on a power sub for base response. Best results will be with a sub box with an independent volume control. Once the volume output is set on the sub the tube amp will adjust the volume. Hope this helps..
- Reply
- Inaccurate
- stacey H on May 24, 2021
- Purchased on Aug 14, 2020
BEST ANSWER: Yes and no, these units rely on a power sub for base response. Best results will be with a sub box with an independent volume control. Once the volume output is set on the sub the tube amp will adjust the volume. Hope this helps..
- Reply
- Inaccurate
- stacey H on May 24, 2021
- Purchased on Aug 14, 2020
No, amp volume does NOT control subwoofer volume, or limit low pass frequency. Subwoofer volume must be controlled at subwoofer.
- Reply
- Inaccurate
- John S on May 25, 2021
- Purchased on Sep 14, 2020
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Replacement tubes?
A shopper
on Aug 9, 2022
BEST ANSWER: No thanks. The ones it comes with work fine.
- Reply
- Inaccurate
- Ryan P on Aug 16, 2022
- Purchased on Dec 31, 2021
BEST ANSWER: No thanks. The ones it comes with work fine.
- Reply
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- Ryan P on Aug 16, 2022
- Purchased on Dec 31, 2021
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Rated 5 out of 5
Excellent.
I've owned this amp for a while now and it has more than shined for I use it for. It's not going to shake the walls but it has enough juice to fill a space with clean absolute sound. Add a DAC and be impressed.
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Rated 5 out of 5
Awesome little amp
Awesome little amp. I connected it to a pair Dali floor standing speakers. It just sounds great. The bluetooth connectivity is very convenient.
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Rated 3 out of 5
okay for a small space where flat response is not needed
Very thin on the bottom end.
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Rated 5 out of 5
Versatile, Economical, Compact.
Very versatile and economical amplifier. Granted, I bought it for the vintage style and compact design, but the performance and audio quality is impressive when I tested it using turntable, SACD player, etc., and some "better than average" speakers. My everyday use is the USB source with Klipsch bookshelves, and 8" subwoofer and the result is better than expected, even with the less than optimal source material. 5-stars.
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Rated 4 out of 5
Nice little amp
Very versatile amp with nice useful options . Only thing I would improve is amount of power . If you have a file , song , video ... with low recorded volume it could be too low to enjoy specially if in louder environment . Also has a headphone jack but the sound for headphones is not the greatest . I'm giving it 4 stars because of what you get for the price .
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Rated 4 out of 5
Prefer auxiliary, not cd/Dvd audio input.
I tried this amp on a friend's audio amp. The optical input worked well. But I could not use the attached FM tuner, because it's audio is not in CD/DVD format. The phono input is much to loud for auxiliary audio. Perhaps a switch could be installed to bypass the phono section when one does not have a preamplified phono. One could also switch off the RIAA equilizer, making the phono input a microphone input. Maybe an adapter could be made for the usb port so that it could receive auxilliary audio.
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Rated 5 out of 5
Nice compact unit, powers speakers to feed iPhone Tunes
Nice compact unit, powers good size speakers to feed iPhone Tunes. Would buy this again in a heartbeat.
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Rated 4 out of 5
Thanks
For the price the Monoprice 25 watt stereo hybrid tube amplifier is well worth it. It is visually stunning. neon like blue lights illuminate its tubes, power switch, and VU meter readout glass. A high-tech retrofit vibe. I purchased it to connect a bass speaker and I couldn't be more pleased with the sound!
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Rated 3 out of 5
Worth it for the tubes.
Looks good, functions OK as a headphone amp.
DAC is very limited and sounds cheap.
At the price, it?s still a bargain. Can hardly buy the tubes for that.
DAC is very limited and sounds cheap.
At the price, it?s still a bargain. Can hardly buy the tubes for that.
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Rated 4 out of 5
Probably a bit underpowered for me...
I took a flyer on this purchase and overall I?m pretty satisfied with it, just need to make a few more tweaks to the setup. It definitely sounds good, it?s just a bit underpowered for me, but considering how often my wife is asking me to turn things down, that?s not necessarily a bad thing! Plenty of input options, including phono, line and optical, as well as a subwoofer out. Pretty cool looking as well! So for the price, I guess you can say I?m good with it all!
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