Monoprice Unity 100-Watt Bridgeable Power Amp
Product # 18513
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So to use in bridged mono, do I use a Y RCA cable to connect the L and R preamp outputs and use the single end to only the left input of this amp? can someone clarify?
A shopper
on Dec 8, 2017
BEST ANSWER: To get the full program from your stereo line out you will need to Y the left and right together then plug mono into the Left input of the Unity amp in bridge mode.
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- Dave L Staff on Dec 12, 2017
BEST ANSWER: To get the full program from your stereo line out you will need to Y the left and right together then plug mono into the Left input of the Unity amp in bridge mode.
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- Dave L Staff on Dec 12, 2017
No, you still need to feed both L/R with the same signal or as the manual states, feed the L input and use the L loop output with a short cable to feed the R input that way both L/R inputs have the same signal.
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- Alex F on Dec 13, 2017
Hi, I just bought this item and am using in mono bridged mode for center channel. I wondered the same thing. The manual explains to use a single cable to top Left input only. Works great.
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- Maggie W on Dec 13, 2017
- Purchased on Nov 24, 2017
i used speaker cable to the block... negative to left negative and positive to right positive
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- ADAM J C on Dec 12, 2017
- Purchased on Sep 17, 2017
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what are the dimension of the unit ?
A shopper
on Dec 12, 2017
BEST ANSWER: The Full Specs section os the product page indicate the dimensions are:Dimensions 8.5" x 10..5" x 1.8" (216 x 267 x 45 mm)
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- Dave L Staff on Dec 19, 2017
BEST ANSWER: The Full Specs section os the product page indicate the dimensions are:Dimensions 8.5" x 10..5" x 1.8" (216 x 267 x 45 mm)
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- Dave L Staff on Dec 19, 2017
It's about a half-rack wide.
It is designed so that 2 of them can be bolted together and the pair fits in a 1U slot of a 19" Rack.
(It's kinda small)
-KP
It is designed so that 2 of them can be bolted together and the pair fits in a 1U slot of a 19" Rack.
(It's kinda small)
-KP
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- Mr. P on Dec 19, 2017
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i plan on using this amp to drive 1 aria in-wall sub. Can i use the subwoofer out on the back of my receiver to connect to the L input channel when bridged?
ed n
on Feb 11, 2018
Monoprice Unity 100-Watt Bridgeable Power Amp
Monoprice Aria In-Wall Speaker, 10in Passive Subwoofer, 200 watts max (single)
BEST ANSWER: Yes, that is exactly how you use this system.
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- Dave L Staff on Feb 20, 2018
BEST ANSWER: Yes, that is exactly how you use this system.
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- Dave L Staff on Feb 20, 2018
I’m using the exact setup they’re recommending. 100w unity and I’m getting almost no woof out of this sub. I have the amp bridged and properly wired and just very little bass response.
However, if I plug in my 100w Klipsch bookcase speaker I get lots of sound. So much I have to dial it back.
My line in comes from the 6-zone amp (the proper line out L/R to the unity).
Any thoughts or maybe I have a dud sub?
However, if I plug in my 100w Klipsch bookcase speaker I get lots of sound. So much I have to dial it back.
My line in comes from the 6-zone amp (the proper line out L/R to the unity).
Any thoughts or maybe I have a dud sub?
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- Philip B on Jul 2, 2019
- Purchased on May 22, 2019
Yes, this should work exactly as you described. Not that the Aria In-Wall subs best suited to add a little extra bass to smaller main speakers, but they can't really take the place of a proper boxed sub in a home theater. I would recommend them for multi-room audio setups, or where being in-wall is an absolute must.
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- Adrian K on Feb 20, 2018
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With the auto-on feature, how long is the delay from when it detects a signal to fully on?
A shopper
on Mar 10, 2018
Monoprice Unity 100-Watt Bridgeable Power Amp
Monoprice Unity 200-Watt Bridgeable Power Amp
BEST ANSWER: It’s about 3 seconds. But I’ve found that mine (with an amazon dot attached to it) almost never turns off anyway. I plan on replacing it with something else and seeing if I can use this elsewhere.
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- Bruce L on Mar 11, 2018
BEST ANSWER: It’s about 3 seconds. But I’ve found that mine (with an amazon dot attached to it) almost never turns off anyway. I plan on replacing it with something else and seeing if I can use this elsewhere.
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- Bruce L on Mar 11, 2018
Light turns green immediately. Audio begins to pass through in approx. 8 seconds.
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- ERIC S on Mar 10, 2018
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I am looking to use this amp with a Chromecast Audio to power outdoor speakers. The speakers outside are pretty far apart and there are a couple of different listening positions. Is there any way to get a mono signal going to two speakers using this amp? I don't believe that the Chromecast Audio has a setting to output mono. Thanks
Greg D
on Jun 21, 2018
BEST ANSWER: This amp can be used 8 ohms bridged. So you can run 2 - 16 ohm speakers in parallel or 2 - 4 ohm speakers in series to give you the 8 ohm load.
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- Ron on Jun 21, 2018
- Purchased on Oct 27, 2017
BEST ANSWER: This amp can be used 8 ohms bridged. So you can run 2 - 16 ohm speakers in parallel or 2 - 4 ohm speakers in series to give you the 8 ohm load.
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- Ron on Jun 21, 2018
- Purchased on Oct 27, 2017
If you want dual mono then just use a 3.5 male stereo (1/8" TRS) to 3.5 female mono (1/8" TS) adaptor plugging directly into the chromecast, then your standard 3.5 male to 2 RCA from the adaptor to the Chromecast Audio. I'm attaching the product that will do it.
Monoprice 3.5mm TRS Stereo Plug to 3.5mm TS Mono Jack Adapter, Gold Plated
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- Mike D on Jun 21, 2018
The only way I could think of doing that is using a Stereo to Mono RCA adaptor, you'd get a Summed Mono (both left and right signals into the same speakers albiet slightly lower in volume) into the amp.
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- Kareem C on Jun 21, 2018
- Purchased on Dec 7, 2017
The Monoprice apm supports one stero speaker channel; meaning a left and right speaker. So, the product will drver two 8 ohm or 4 ohm speakers.
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- Rick P on Jun 21, 2018
- Purchased on Jan 22, 2018
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Looking to purchase two pairs of the 6.5 inch weatherproof outdoor monoprice speakers. It looks like the 100w version of this amp will work at 8 ohms, but wondering if this amp is optimal for an outdoor application (amp will be indoors of course)? Thanks!
A shopper
on Jun 7, 2019
BEST ANSWER: This amp will work fine for outdoors. Depending on how much area you plan on covering I might go up to the 200W version. It is always better to have a little too much power and back off than be under-powered and push it in to clipping.
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- Dave L Staff on Jun 7, 2019
Monoprice Unity 200-Watt Bridgeable Power Amp
BEST ANSWER: This amp will work fine for outdoors. Depending on how much area you plan on covering I might go up to the 200W version. It is always better to have a little too much power and back off than be under-powered and push it in to clipping.
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- Dave L Staff on Jun 7, 2019
Monoprice Unity 200-Watt Bridgeable Power Amp
As you can see by the picture of the product, it is an open vented box and would need to be placed in a protected area. I also am not completely happy with the unit as it has a low level buzz around 120Hz with lower level ringing around 2KHz. It is gain sensitive so with the amp at a mid-level gain setting, it is pretty low and only noticable in a quiet room with no actual signal.
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- Susan L on Jun 8, 2019
- Purchased on May 18, 2019
I’m using the 100w to drive a pair of Polk Atrium 4 speakers that are 8 ohm on our deck and the setup is working great. I use an Amazon echo to provide the audio. The auto triggering on the amp is a nice feature too.
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- Tom P on Jun 9, 2019
- Purchased on Apr 1, 2019
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If these specs are correct, I can power four(4) 8 ohm speakers off the two channels on the Unity 200-watt amp (4 ohm load), at 62.5 watts per speaker - which is 12.5 more watts per speaker than getting two(2) Unity 100-watt amps to power the same four speakers (50 watts @ 8 ohm load) while saving space in my rack - with the only draw back being the higher THD and perhaps higher heat from running the amp at 4 ohms? Am I thinking correctly?
New User U
on Mar 6, 2017
Monoprice Unity 100-Watt Bridgeable Power Amp
Monoprice Unity 200-Watt Bridgeable Power Amp
BEST ANSWER: Thanks for your interest in these power amps. You are correct, you will get more power to each speaker using the 200W than 2 x 100W. 2 x100W will run cooler and more efficiently. Depending on your requirements and speakers the difference may be negligible.
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- Dave L Staff on Mar 13, 2017
BEST ANSWER: Thanks for your interest in these power amps. You are correct, you will get more power to each speaker using the 200W than 2 x 100W. 2 x100W will run cooler and more efficiently. Depending on your requirements and speakers the difference may be negligible.
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- Dave L Staff on Mar 13, 2017
If you run an amp at high power, especially if you run it for a long periods, you will certainly damage the amp long term... More power = more heat = more signal degradation / damage. In most instances, you are better off running two amps at a lower power for longer than a single amp at full power. Of course, this totally depends upon the volume that you wish to derive from the setup. If you're only going to operate at 10 percent power, no issues. However, if you're running at 90 - 100 percent, because you want lots of volume, you're probably better off running two amps at 50 percent.
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- Lance B on Mar 14, 2017
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I have 12 pairs of ceiling speakers (8 ohms, 20-100watts per channel), 2 zones also include the Aria in-wall Sub. 4 of the zones could feature 3 or 4 speakers. What is the best way to minimize the number of amps? I will run each zone via Airport Express or Apple TVs.
John L
on Jan 28, 2018
BEST ANSWER: If I was running that many speakers, Id go for an AV receiver or two, depending on your setup. Some even run a second or third zone, so You could have your larger 4 speaker area as the main zone, and then one or two other zones. Most receivers that have networking have airplay built in. Then you can run things from one or two units, instead of trying to juggle 4-6 different apple TVs. Also, look into Yamaha musicast, it might be something that interests you - it's built into their products. I attached 2, but it's likely that there are many that could fit your needs. Also, If you're just planning to play the same music in different rooms, you could connect other speakers to the main zone, and have the receiver do multi-channel stereo- where it sends a stereo signal to each pair of speakers in the main zone. With this, you could even put a volume control in the other rooms. Without knowing more specifics, this is the best advice I can offer. If you really just want to use these amps, you could try splitting the signal. It will mean less power and volume per speaker though, and you run the risk of over-driving this amp. You will need an amp for your in-wall subs though, whichever route you go. I am currently using one of these amps to run 2 of the same subs you have. I run it in bridge mode and then split the output to the two speakers.
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- Rick G on Jan 29, 2018
Monoprice Speaker Volume Controller RMS 100W (Rotary Type) - White
Yamaha RX-V483BL MusicCast 5.1CH Dolby True HD & DTS Master HD 4K Ultra HD pass-thru HDCP 2.2 HDR, Dolby Vision, Hybrid Log-Gamma, BT.2020 Home Theater Receiver - Black
Onkyo TX-NR575 7.2 Channel Network A/V Receiver
BEST ANSWER: If I was running that many speakers, Id go for an AV receiver or two, depending on your setup. Some even run a second or third zone, so You could have your larger 4 speaker area as the main zone, and then one or two other zones. Most receivers that have networking have airplay built in. Then you can run things from one or two units, instead of trying to juggle 4-6 different apple TVs. Also, look into Yamaha musicast, it might be something that interests you - it's built into their products. I attached 2, but it's likely that there are many that could fit your needs. Also, If you're just planning to play the same music in different rooms, you could connect other speakers to the main zone, and have the receiver do multi-channel stereo- where it sends a stereo signal to each pair of speakers in the main zone. With this, you could even put a volume control in the other rooms. Without knowing more specifics, this is the best advice I can offer. If you really just want to use these amps, you could try splitting the signal. It will mean less power and volume per speaker though, and you run the risk of over-driving this amp. You will need an amp for your in-wall subs though, whichever route you go. I am currently using one of these amps to run 2 of the same subs you have. I run it in bridge mode and then split the output to the two speakers.
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- Rick G on Jan 29, 2018
Monoprice Speaker Volume Controller RMS 100W (Rotary Type) - White
Yamaha RX-V483BL MusicCast 5.1CH Dolby True HD & DTS Master HD 4K Ultra HD pass-thru HDCP 2.2 HDR, Dolby Vision, Hybrid Log-Gamma, BT.2020 Home Theater Receiver - Black
Onkyo TX-NR575 7.2 Channel Network A/V Receiver
Get a multi-channel amp, that's the best way to minimize amps and keep the system as efficient as possible.
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- Kareem C on Jan 30, 2018
- Purchased on Dec 7, 2017
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Can you use this with 6 ohm speakers?
A shopper
on Apr 26, 2018
BEST ANSWER: yes. I'm using #13706 and they work perfectly.
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- ROBERT T on Apr 26, 2018
- Purchased on Mar 3, 2018
Monoprice Select 5.25-Inch 2-Way Bookshelf Speakers (Pair), Black Finish
BEST ANSWER: yes. I'm using #13706 and they work perfectly.
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- ROBERT T on Apr 26, 2018
- Purchased on Mar 3, 2018
Monoprice Select 5.25-Inch 2-Way Bookshelf Speakers (Pair), Black Finish
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Can I use this to make my 5.1.2 setup to 5.1.4?
A shopper
on Apr 10, 2020
BEST ANSWER: if your pre/processor has the appropriate outputs to support the additional channels, then yes
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- patrick b on Apr 10, 2020
BEST ANSWER: if your pre/processor has the appropriate outputs to support the additional channels, then yes
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- patrick b on Apr 10, 2020
Yes as long as you have the appropriate pre outs on ur Main avr
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- Scott A on Apr 10, 2020
- Purchased on Apr 24, 2019
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Can you take the cover off and give us pictures of the inside of the amps ?
A shopper
on Mar 10, 2017
BEST ANSWER: Thanks for your interest in this power amp. Monoprice has a 30 day full refund policy and 1 year warranty. If you are not satisfied with the performance of this product you have no risk of losing. The sound is very clean and the power is good.
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- Dave L Staff on Mar 17, 2017
BEST ANSWER: Thanks for your interest in this power amp. Monoprice has a 30 day full refund policy and 1 year warranty. If you are not satisfied with the performance of this product you have no risk of losing. The sound is very clean and the power is good.
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- Dave L Staff on Mar 17, 2017
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I would like to connect an unbalanced MiniDSP 2x4 to the Unity 100W amp. The MiniDSP has a max output voltage of 0.9v. Will this work with the amp?
(I'm told that there should be a rating called 'input sensitivity' to measure this, and that it needs to be at or below 0.9v. I'm also told that input sensitivity can be calculated off of gain and output wattage. Since this amplifier has adjustable gain, what are the minimum and maximum gain settings?)
(I'm told that there should be a rating called 'input sensitivity' to measure this, and that it needs to be at or below 0.9v. I'm also told that input sensitivity can be calculated off of gain and output wattage. Since this amplifier has adjustable gain, what are the minimum and maximum gain settings?)
A shopper
on Apr 3, 2017
BEST ANSWER: Thanks for your interest in this power amp. The Unity series of stereo power amps do not have adjustable input sensitivity. The input will accommodate line input voltage from 400mV (0.4V) to 2V. Rear mounted output volume is adjusted to provide max power before distortion to your speakers. If you have any further questions please contact tech support.
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- Dave L Staff on Apr 13, 2017
BEST ANSWER: Thanks for your interest in this power amp. The Unity series of stereo power amps do not have adjustable input sensitivity. The input will accommodate line input voltage from 400mV (0.4V) to 2V. Rear mounted output volume is adjusted to provide max power before distortion to your speakers. If you have any further questions please contact tech support.
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- Dave L Staff on Apr 13, 2017
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Could I use 2 of these, on mono bridge mode, to biamp a center channel speakers (1 for HF, 2nd for LF) ?. Considering my AVR DENON 4300h has as all AVR preouts, one single center preout, if I split the signal for both amps it will degrade or affect sound performance ?
New User U
on Jan 15, 2019
BEST ANSWER: Do you have an outboard digital crossover to bi-amp the center? Splitting a preamp output into two doesn't accomplish what I think you want to accomplish.
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- New User U Staff on Jan 16, 2019
BEST ANSWER: Do you have an outboard digital crossover to bi-amp the center? Splitting a preamp output into two doesn't accomplish what I think you want to accomplish.
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- New User U Staff on Jan 16, 2019
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Vote for the best answer above!
Can the RCA analog out jack feed the low level audio signal out and into an analog input on a TV soundbar?
If so, could the soundbar and the outside speakers be playing at the same time?
My primary use is to feed my outside 2 patio loudspeakers, but wondering if this unit would also function as an audio source by feeding it's signal into my bedroom's soundbar (not purchased yet). Source would be an RPi as a ROON endpoint.
If so, could the soundbar and the outside speakers be playing at the same time?
My primary use is to feed my outside 2 patio loudspeakers, but wondering if this unit would also function as an audio source by feeding it's signal into my bedroom's soundbar (not purchased yet). Source would be an RPi as a ROON endpoint.
Glenn S
on Apr 9, 2019
Monoprice Unity 100-Watt Bridgeable Power Amp
Monoprice Unity 200-Watt Bridgeable Power Amp
BEST ANSWER: Thank you for your question.
These amplifiers can output audio to both the speaker wire and RCA outputs simultaneously.
These amplifiers can output audio to both the speaker wire and RCA outputs simultaneously.
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- Tyler C Staff on Apr 10, 2019
BEST ANSWER: Thank you for your question.
These amplifiers can output audio to both the speaker wire and RCA outputs simultaneously.
These amplifiers can output audio to both the speaker wire and RCA outputs simultaneously.
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- Tyler C Staff on Apr 10, 2019
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If I have 2 pairs of 8ohm speakers that I want to connect to this, will the amp support simply connecting them in parallel and setting the switch to 4ohm?
A shopper
on May 15, 2019
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Do these use ICEPOWER Class-D amplifier modules?
A shopper
on May 23, 2019
Monoprice Unity 100-Watt Bridgeable Power Amp
Monoprice Unity 200-Watt Bridgeable Power Amp
Monoprice Unity 450 Watt Bridgeable Power Amp
Unity 200-Watt Bridgeable Power Amp (Open Box)
Monoprice Unity 450 Watt Bridgeable Power Amp (Open Box)
Monoprice Unity 100-Watt Bridgeable Power Amp (Open Box)
BEST ANSWER: No, we do not use the branded ICEPower amp modules. These are Class-D amps that run very cool, have plenty of power, and run clean.
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- Dave L Staff on May 24, 2019
BEST ANSWER: No, we do not use the branded ICEPower amp modules. These are Class-D amps that run very cool, have plenty of power, and run clean.
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- Dave L Staff on May 24, 2019
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Would this be able to power a small 70v system for a classroom?
WHITNEY B H
on Feb 27, 2020
BEST ANSWER: Thank you for your question.
No, this amp does not support Commercial 70V or 100V speakers.
Something like #36373 would however.
No, this amp does not support Commercial 70V or 100V speakers.
Something like #36373 would however.
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- Tyler C Staff on Feb 27, 2020
Monoprice Commercial Audio 60W 3ch 100/70V Mixer Amp with Bluetooth
BEST ANSWER: Thank you for your question.
No, this amp does not support Commercial 70V or 100V speakers.
Something like #36373 would however.
No, this amp does not support Commercial 70V or 100V speakers.
Something like #36373 would however.
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- Tyler C Staff on Feb 27, 2020
Monoprice Commercial Audio 60W 3ch 100/70V Mixer Amp with Bluetooth
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I would like to power an alpha in-wall sub (150 watt RMS) with a 100W Unity amp, since it actually provides 120W mono bridged. Will I be significantly underpowered?
Brian C
on Apr 15, 2020
Monoprice Unity 100-Watt Bridgeable Power Amp
Monoprice Alpha In-Wall Speaker 10in Carbon Fiber 300W Subwoofer (each)
BEST ANSWER: It depends if you're planning to drive the speaker hard. Most people don't. I had 3 of the 150W subs in my home, but found they would pop at medium volume if a really low frequency hit them. It made movie time unpleasant. I replaced them with the 300W Amber series subwoofer, and used 200W Unity amps bridged to drive them, and it's a world better.
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- Paul R on Apr 15, 2020
BEST ANSWER: It depends if you're planning to drive the speaker hard. Most people don't. I had 3 of the 150W subs in my home, but found they would pop at medium volume if a really low frequency hit them. It made movie time unpleasant. I replaced them with the 300W Amber series subwoofer, and used 200W Unity amps bridged to drive them, and it's a world better.
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- Paul R on Apr 15, 2020
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Setup the Unity 100 to power my ATMOS speakers on my Denon AVR-X4200w, connected using monoprice premium 2 RCA cable, there is a loud buzz even when the AVR is off coming from the speakers, and the output from the right channel is minimal. Checked and confirmed my speaker is fine as I connected back to the AVR direct and did a test tone and output was fine. Even with the volume on the Amp set at minimal the buzz is quite loud and noticeable. Did I get a bad amp? Is there a work around to get the right channel to work and buzz to go away?
Sean S
on Apr 2, 2018
Monoprice Unity 100-Watt Bridgeable Power Amp
Monoprice 3ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable, Black
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39 Reviews
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poorly designed speaker input
The speaker input block the sticks out of the back of the unit is loose, and thus the sound that comes out of the speakers is either off or scratchy. Very gently wiggling the block can fix the issue, but as soon as I let go of it, the scratchy sound returns. I'll try another one, but it looks like a poor design. If the replacement works better, i'll update this review.
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November 16, 2019
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Plenty of power for my application
Works perfectly to power three MB Quart subs in a bass platform mounted under my home theater chairs!
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Not much power with buzz
I bought it to power the center speaker of my surround sound system. Not to sure about the power rating because I have to run it in bridge mode to get enough power. The unit also has a buzz around 120Hz with additional ringing around 2Khz that is pretty irritating if the amp is set to max gain. Set a mid-level gain the buzz is only noticable with no signal in a quiet room, but still unacceptable in my opinion.
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Great simple amp
I am using this with an airport express to add an outdoor speaker AirPlay 2 zone. It works perfectly. With the auto-sense power mode, it does take a full 10 seconds from starting playing music from airplay for the amp to start outputting sound. This is a pretty long time, but for my use it is fine. The amp consistently shuts off after 12 minutes of no music playing. The 100W is PLENTY power enough to drive 4 speakers (8ohm wired in parallel with switch set to 4ohm) in an outdoor yard area with the volume set to maybe 60%.
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May 28, 2019
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Works great
Works as advertised and I like the auto on feature. I am planning on purchasing an additional unit to power another set of outdoor speakers.
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Great lil Amp
Great for a SONOS connect unit. Plenty of power and auto on works great! Highly recommended.
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Works great
Product works great with my in wall subwoofer
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Multi-room sound from four Unity amps and four Echo Dots
Looking for a great way to get a multi-room audio system without breaking the bank, these amplifiers are the ticket. I setup four of these with four echo dots powering the existing speakers in my house (master bedroom, kitchen, living room and garage). They work perfectly, plenty of power, great sound, low noise and they turn on and off automatically. Totally satisfied!
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good sound but has a screeching sound when powering off
thats the only problem with my unit is that when i hit the power switch to power it off it makes a screeching sound.
the sound quality is good tho with my surround sound reciever pre amp out puts.
fyi i also tried this amp with on its own connected to my desktop computer and i still get that screeching sound every time i turn it off
i gave it 3 stars cause of the powering off screeching sound and cause the units level adjustment has to adjusted from the back with a small screw driver.
the sound quality is good tho with my surround sound reciever pre amp out puts.
fyi i also tried this amp with on its own connected to my desktop computer and i still get that screeching sound every time i turn it off
i gave it 3 stars cause of the powering off screeching sound and cause the units level adjustment has to adjusted from the back with a small screw driver.
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Perfect
Plenty of cool running power. I have 2 of these and 4 of the 200w models to power all the speakers in my house. Coupled with an Apple Express, I can play content without turning on or off the amplifiers, the auto on feature is great. The small form factor was a plus for me also.
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