Monoprice Unity 100-Watt Bridgeable Power Amp
Product # 18513
UPC # 889028045336
$199.99
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Key Features
- Class‑D amplifier providing 50 watts/channel (RMS) into 8 ohm loads or 65 watts/channel into 4‑ohm loads
- Bridgeable output provides 120 watts into a single 8‑ohm load
- 4‑pole detachable speaker screw connector (Euroblock connector) with support for up to 12 AWG speaker wire
- 12‑volt trigger input for power‑on/off
- 12‑volt trigger output for controlling other devices
- Buffered loop output of original signal for connecting additional amplifiers
- Rear panel volume gain adjustment
- Built‑in thermal and short circuit protection circuits
- Includes rackmount ears for mounting a single amp or two amps side‑by‑side
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User's Manual PDF
Questions and Answers
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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.
- Reply(1)
- Inaccurate
- 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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- Inaccurate
- 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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Can I use a turntable?
Roger C
on May 22, 2022
BEST ANSWER: This amp does not have a turntable input (no preamp), so you'd either need an external preamp or a turntable that had a line level output.
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- cgp4 on May 22, 2022
BEST ANSWER: This amp does not have a turntable input (no preamp), so you'd either need an external preamp or a turntable that had a line level output.
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- cgp4 on May 22, 2022
Yep. It's got 2 RCA inputs so you should be good. I use mine with a System but experimented with a bunch of things and they all worked.
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- Timothy B on May 23, 2022
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If I bridge 2 channels to one will the bridged channel be stereo?
New User U
on Aug 6, 2022
BEST ANSWER: If you're asking whether, in bridged mode, the device mixes the Left input and the Right input together (so that you get both in the single bridged output channel), then the answer is no. In bridged mode it only uses whatever is coming into the Left input. However, you can mix those externally with a y-adapter like the one noted below. Then just plug the male part of the y-adapter into the Left input of the amp.
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- cgp4 on Aug 6, 2022
Monoprice Onix Series - 1-Male to 2-Female RCA Y-Adapter, 12in, Black
BEST ANSWER: If you're asking whether, in bridged mode, the device mixes the Left input and the Right input together (so that you get both in the single bridged output channel), then the answer is no. In bridged mode it only uses whatever is coming into the Left input. However, you can mix those externally with a y-adapter like the one noted below. Then just plug the male part of the y-adapter into the Left input of the amp.
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- cgp4 on Aug 6, 2022
Monoprice Onix Series - 1-Male to 2-Female RCA Y-Adapter, 12in, Black
Both channels will be blended into one so you won’t miss out on any sound coming only left or right
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- james b on Aug 6, 2022
Bridging usually means you get a mono amp with increased power. One channel in and one out.
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- David M on Aug 9, 2022
No. When you bridge and 2 channel amp into one channel the result is one mono channel
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- adam a on Aug 6, 2022
You are combining two separate (stereo) channels into 1 channel, hence the term mono.
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- Landy on Aug 6, 2022
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Does this accept banana plugs?
A shopper
on Apr 13, 2024
BEST ANSWER: Hi, thank you for your inquiry. It does not support banana plugs on its speaker terminals. I hope this helps.
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- Jhomar R Staff on Aug 5, 2025
BEST ANSWER: Hi, thank you for your inquiry. It does not support banana plugs on its speaker terminals. I hope this helps.
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- Jhomar R Staff on Aug 5, 2025
The Unity Amp uses the Phoenix type speaker wire connector block (see the website image of the back of the unit). It does not accept banana plugs. To connect speakers, you unplug the connector block, screw wire leads into the terminals, then plug the connector block back in. This setup is for connections that don't require frequent changing of speaker wires.
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- Jeffrey K on Apr 13, 2024
No, it doesn't. It shows in the pictures, and says in the specs:
"4‑pole detachable speaker screw connector (Euroblock connector) with support for up to 12 AWG speaker wire"
"4‑pole detachable speaker screw connector (Euroblock connector) with support for up to 12 AWG speaker wire"
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- Gabe S on Apr 13, 2024
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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 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 M 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 M 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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Hello Does this have a 70v output?
A shopper
on Mar 21, 2023
BEST ANSWER: The voltage output on a home audio amplifier with 8 ohm speakers will depend on the power of the amplifier. A more powerful amplifier will deliver more voltage. The standard output voltage for a home audio amplifier is 10 volts. This is the voltage that is needed to drive an 8-ohm speaker to its full power.
The output voltage of an amplifier is determined by the following formula:
Output Voltage = Power / Resistance
where:
Power is the output power of the amplifier in watts
Resistance is the resistance of the speakers in ohms
For example, if an amplifier has an output power of 100 watts and the speakers have a resistance of 8 ohms, the output voltage will be 12.5 volts. watts and the speakers have a resistance of 8 ohms, the output voltage will be 12.5 volts.
The output voltage of an amplifier is determined by the following formula:
Output Voltage = Power / Resistance
where:
Power is the output power of the amplifier in watts
Resistance is the resistance of the speakers in ohms
For example, if an amplifier has an output power of 100 watts and the speakers have a resistance of 8 ohms, the output voltage will be 12.5 volts. watts and the speakers have a resistance of 8 ohms, the output voltage will be 12.5 volts.
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- Ryan J on Mar 21, 2023
BEST ANSWER: The voltage output on a home audio amplifier with 8 ohm speakers will depend on the power of the amplifier. A more powerful amplifier will deliver more voltage. The standard output voltage for a home audio amplifier is 10 volts. This is the voltage that is needed to drive an 8-ohm speaker to its full power.
The output voltage of an amplifier is determined by the following formula:
Output Voltage = Power / Resistance
where:
Power is the output power of the amplifier in watts
Resistance is the resistance of the speakers in ohms
For example, if an amplifier has an output power of 100 watts and the speakers have a resistance of 8 ohms, the output voltage will be 12.5 volts. watts and the speakers have a resistance of 8 ohms, the output voltage will be 12.5 volts.
The output voltage of an amplifier is determined by the following formula:
Output Voltage = Power / Resistance
where:
Power is the output power of the amplifier in watts
Resistance is the resistance of the speakers in ohms
For example, if an amplifier has an output power of 100 watts and the speakers have a resistance of 8 ohms, the output voltage will be 12.5 volts. watts and the speakers have a resistance of 8 ohms, the output voltage will be 12.5 volts.
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- Ryan J on Mar 21, 2023
no, you would need to get a 70V matching transformer
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- mark p on Mar 21, 2023
- Purchased on Dec 17, 2019
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Can you use this with 6 ohm speakers?
A shopper
on Apr 26, 2018
BEST ANSWER: Yes. All my speakers are 6 ohm. Works very well
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- Eric S on Mar 15, 2021
- Purchased on Feb 20, 2021
BEST ANSWER: Yes. All my speakers are 6 ohm. Works very well
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- Eric S on Mar 15, 2021
- Purchased on Feb 20, 2021
yes. I'm using #13706 and they work perfectly.
Monoprice Select 5.25-Inch 2-Way Bookshelf Speakers (Pair), Black Finish
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- ROBERT T on Apr 26, 2018
- Purchased on Mar 3, 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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is there a rack or wall mount kit for this unit?
A shopper
on Jun 6, 2024
BEST ANSWER: Hi, it comes with 2x short rack-mount ears and 1x rack-mount ear. I hope this helps.
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- Jhomar R Staff on Jun 6, 2024
BEST ANSWER: Hi, it comes with 2x short rack-mount ears and 1x rack-mount ear. I hope this helps.
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- Jhomar R Staff on Jun 6, 2024
The amp came with
2x Short rack-mount ears
1X Long rack-mount ear
1x Bridge plate
2x Short rack-mount ears
1X Long rack-mount ear
1x Bridge plate
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- Chris on Jun 11, 2024
It comes with standard 19" rack mount hardware and requires 1U space..
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- Eric E on Jun 6, 2024
- Purchased on Nov 3, 2023
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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 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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Would one of these amps work well for powering an Elac Debut C6.2 Center channel speaker?
Which wattage and how would I wire it? Mono bridge? Would the 100watt be plenty in that case?
Which wattage and how would I wire it? Mono bridge? Would the 100watt be plenty in that case?
A shopper
on Mar 25, 2021
BEST ANSWER: yes this would work in a monobridge. your elac is a 120w speaker so be careful not to overpower it. you will need some kind of volume control to limit the amount of power to your elac. one of these little amps makes a lot of noise with two speakers so it will do even better with one at 8ohm.
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- Eric S on Mar 25, 2021
- Purchased on Feb 20, 2021
BEST ANSWER: yes this would work in a monobridge. your elac is a 120w speaker so be careful not to overpower it. you will need some kind of volume control to limit the amount of power to your elac. one of these little amps makes a lot of noise with two speakers so it will do even better with one at 8ohm.
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- Eric S on Mar 25, 2021
- Purchased on Feb 20, 2021
Bridged at 8ohm gives you 120w which is double of what most receivers give you. And would be plenty for the elac c6.2.
You would want to bridge the amp if connecting to your center speaker
You would want to bridge the amp if connecting to your center speaker
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- Christopher L on Mar 25, 2021
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Can i power 2 Alpha in wall subs with 200W version? should i connect in parallel and in bridged mode?
karan k
on May 17, 2021
Monoprice Unity 100-Watt Bridgeable Power Amp
Monoprice Alpha In-Wall Speaker 10in Carbon Fiber 300W Subwoofer (each)
Monoprice Alpha In-Wall Speaker 10in Carbon Fiber 300W Subwoofer (each) (Open Box)
BEST ANSWER: I run the 200w version with two subs no problem. Best way way to power these would be a “Y” cable from your subwoofer output into the RCA connections with normal wiring to each speaker at 8ohms. That way each speaker is matched for impedance and both are getting the LFE signal.
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- Colton C on May 17, 2021
BEST ANSWER: I run the 200w version with two subs no problem. Best way way to power these would be a “Y” cable from your subwoofer output into the RCA connections with normal wiring to each speaker at 8ohms. That way each speaker is matched for impedance and both are getting the LFE signal.
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- Colton C on May 17, 2021
I'm running two in parallel with the 200w Amp in bridged mode. There's more than enough power in that amp for a moderate sized room. The bass is a little boomy, but the intended purpose is movies so that's OK.
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- Matthew Jochum A on May 17, 2021
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What else is needed to use this? Would I need to buy both a pre-amp and as well as a DAC to drive a pair of speakers?
New User U
on Aug 26, 2022
BEST ANSWER: Depends on what your input source is if it has base band audio outputs (RCA or head phone jack) or even if you buy a converter cord for you phone you should be good to go. Only if you are using a older style of turntable will you need to use a preamp.
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- Bruce R on Aug 27, 2022
BEST ANSWER: Depends on what your input source is if it has base band audio outputs (RCA or head phone jack) or even if you buy a converter cord for you phone you should be good to go. Only if you are using a older style of turntable will you need to use a preamp.
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- Bruce R on Aug 27, 2022
You would need a pre-amp/ source, or a combination type device like a music streaming device that essentially is a preamp and DAC in one.
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- Chris T on Aug 27, 2022
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Bi-ampimg center channel, would it be possible to run a single rca from the center preout on the receiver into a Y-plitter into the unity amplifier L/R inputs then use each channel (L/R) to bi amp the center speaker?
Kevin F
on Nov 25, 2022
Given the center output on your amplifier is a single RCA, you'd just run the Monoprice amp in bridged mode (which combines left and right into a single, more powerful channel, so you can run a less powerful amplifier, since you'll be combining the power of left and right into one channel), then just connect your center channel to the Monoprice amplifier like normal. Information on bridging the amp is in the manual, which is linked on the product page, at the bottom.
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- Paul R on Nov 30, 2022
Thank you for your reply. I should have listed more info in my orginal question... the issue is the center channel speaker is 4 ohm and the 100w unity amplifier is rated for 8 ohm bridged.
That changes things. You'll overdrive the amplifier with a 4 ohm load when it's expecting an 8 ohm load. Amplifiers typically won't do 4 ohm while bridged, unless the amplifier is capable of driving a 2 ohm load in stereo. You'd have to add a second 4 ohm speaker in series to present an 8 ohm load to the amplifier, or find some other way to bump up the impedance that the amplifier will see.
The speaker is capable of bi-amping. So figured I'd just run the center that way. It'll be 4ohm to each pair of speakers.
In that case, then you could run the amp in stereo, feed left and right to your speaker, then use a Y adapter to get your mono center channel signal to the left and right of the amplifier so the speaker sees the same audio on both channels.
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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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I want to know if the 100 watt version of this power amp will be sufficient to run my 2 rear surrounds in my 7.2.4 system
Denon X3700h, to Klipsch R41-m surrounds rated
REQUENCY RESPONSE 68Hz - 21kHz +/- 3dB
SENSITIVITY 90 dB @ 2.83V/1M
POWER HANDLING (CONT/PEAK) 50W/200W.
OR do I need the 200 watt version to assure enough power?
It looks like the 100 watt version can deliver 50 watts x 2 in this case?
Denon X3700h, to Klipsch R41-m surrounds rated
REQUENCY RESPONSE 68Hz - 21kHz +/- 3dB
SENSITIVITY 90 dB @ 2.83V/1M
POWER HANDLING (CONT/PEAK) 50W/200W.
OR do I need the 200 watt version to assure enough power?
It looks like the 100 watt version can deliver 50 watts x 2 in this case?
New User U
on Apr 18, 2021
BEST ANSWER: The 100 watt version will likely be sufficient depending on the room size and acoustic environment, but I would recommend the 200 watt version for better dynamics.
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- Eric E on Dec 18, 2023
- Purchased on Nov 3, 2023
BEST ANSWER: The 100 watt version will likely be sufficient depending on the room size and acoustic environment, but I would recommend the 200 watt version for better dynamics.
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- Eric E on Dec 18, 2023
- Purchased on Nov 3, 2023
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Rated 5 out of 5
Monoprice Unity 100 amp
Works great! Does everything thing perfectly! Happy I purchased it! Recommend if you need 50 watts per channel!
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Response from Monoprice
We're thrilled to hear that the Monoprice Unity 100-Watt Bridgeable Power Amp is working great for you and meeting your needs perfectly! Thank you for your recommendation, and we're glad you're happy with your purchase. If you ever have any questions or need assistance, we're here to help. Enjoy your music!
February 15, 2024
Eli S
Rated 5 out of 5
Great utility amp for professionals
Excellent utility amp for installation professionals. We'll see how long it lasts, but it runs cool so it'll probably last for years.
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Rated 5 out of 5
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Rated 5 out of 5
Very good price and quality
I'm an IT manager for a restaurant chain, and I've been using these for a few years at our stores for music. Haven't had any fail on me yet. They just work!
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Rated 5 out of 5
Great for the price
I'm using 2 of these to power rear and side surrounds on a pioneer VSX-LX505. So far its been fine. I like that they have an in and out on the trigger. Think its good option for for surrounds or ceiling especially 9 channel AVRs with 11 channel processing.
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Rated 5 out of 5
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Rated 5 out of 5
Great little amps
These are great little amps. Affordable. I just simply plug in my echo dot into it using a 3.5mm to RCA adapter and then use more RCA cables to daisy chain to 3 other amps. I run 8 outdoor speakers with them or I should say my daughter does.
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Rated 4 out of 5
Good value and lots of sound for the size
Lots of power for ceiling speakers. Fills the rooms nicely
I added 6 amps with an equalizer to power up a total of 12 ceiling speakers. They sound great!
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Rated 3 out of 5
Subpar - Go with higher watt
I guess I expected something a little easier and more powerful.
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Rated 5 out of 5
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