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Monoprice Monolith M2100X 2x90W Per Channel Home Theater Power Amplifier
$200
$400
50% off
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Monoprice has Monoprice Monolith M2100X 2x90W Per Channel Home Theater Power Amplifier (43863) on sale for $399.99 - 50% with promo code MOVE50 in cart = $199.99. Shipping is free.
Thanks to Deal Hunter TattyBear for sharing this deal.
Details:
Thanks to Deal Hunter TattyBear for sharing this deal.
Details:
- 2 Channels of Amplification
- 90 Watts Per Channel into 8 ohms
- Unbalanced RCA Inputs
- XLR Inputs
- 3RU Height
- Class AB Amplification
- 3 Year Replacement Warranty
Editor's Notes
Written by SaltyOne | Staff- Rated 4.7 out of 5 stars from customer reviews.
- This price matches our recent Frontpage Deal.
- At the time of this posting, our research indicates that this is $120 lower than the next best comparable online prices starting from $319.99.
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Monoprice has Monoprice Monolith M2100X 2x90W Per Channel Home Theater Power Amplifier (43863) on sale for $399.99 - 50% with promo code MOVE50 in cart = $199.99. Shipping is free.
Thanks to Deal Hunter TattyBear for sharing this deal.
Details:
Thanks to Deal Hunter TattyBear for sharing this deal.
Details:
- 2 Channels of Amplification
- 90 Watts Per Channel into 8 ohms
- Unbalanced RCA Inputs
- XLR Inputs
- 3RU Height
- Class AB Amplification
- 3 Year Replacement Warranty
Editor's Notes
Written by SaltyOne | Staff- Rated 4.7 out of 5 stars from customer reviews.
- This price matches our recent Frontpage Deal.
- At the time of this posting, our research indicates that this is $120 lower than the next best comparable online prices starting from $319.99.
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Deal History
Deal History includes data from multiple reputable stores, such as Best Buy, Target, and Walmart. The lowest price among stores for a given day is selected as the "Sale Price".
Sale Price does not include sale prices at Amazon unless a deal was posted by a community member.
Sale Price does not include sale prices at Amazon unless a deal was posted by a community member.
Sale Price
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Top Comments
Long story short, this amp drives the problem speakers (including in multiple rooms simultaneously, if desired) beautifully. On a low volume level, this thing has no issues surpassing what the supposedly high power amp in the receiver could pull off. So I'm pretty happy with it.
Now, for anyone considering buying it:
1) You need an input that has its own volume control. You can't just use "line out" from something, because that will be at "line level" volume. You need some way to adjust that volume. In my case, I just use the headphone jack from the receiver and pipe it around back to the amp 🤣 ... something like:
https://www.amazon.com/MOSWAG-Qua...B09GFC54G
2) You need a way to turn the amp on and off automatically. Fortunately, this amp has a 12v trigger. Not all amp triggers work the same, but I got super lucky because my receiver has a USB power output that only comes on when the receiver is on, and I had a USB to 12v barrel plug adapter, and a barrel plug to 2.5mm TRS jack, and that combo meant that my receiver will turn on and off the amp, no soldering required! (The last amp I set up an auto trigger for required a relay, some soldering, custom plugs, and integration between Harmony remotes and Samsung SmartThings! So I was SUPER pleased with this one!) Something like:
https://www.amazon.com/Charging-U...B0BXPXZMSP or https://www.aliexpress.
*and* https://www.aliexpress.
I was so happy to be able to get this working without an in-depth soldering + wiring + programming solution. The sound is great. The build looks quite reasonable, even though Monoprice is the Walmart of electronics.
Community Reviews
The Monoprice Monolith M2100X is a two channel power amplifier that stands out for strong, clean output at its sale price. It is described as driving passive speakers well, even in ceiling and multi room setups, with little distortion until extreme levels and a noticeable lift in larger home theater systems. The main limitation is that it has no volume control, so it needs a separate preamp, receiver, or other source with volume handling. The XLR inputs are also described as unbalanced, so balanced use should be checked before buying. A solid modular amp if you already have the rest of the chain.
The amplifier can deliver a clean sound floor with little distortion or clipping until extreme levels.
The amp can drive in-ceiling stereo speakers that were damaging integrated receivers effectively.
The amp can provide a noticeable upgrade when powering front, surround, and height speakers in a multi-channel setup.
The amp can be useful for freeing receiver channels by powering left and right channels with dedicated 90 W output.
The amplifier lacks volume control and requires an external preamp or head unit for volume adjustment.
The amplifier may not provide truly balanced performance through XLR inputs, so balanced-use buyers should verify first.
The amp's continuous 90 W output can be misunderstood versus peak power marketing, which may affect expectations.
The sound improvement from adding a similar power amp can be slight and system-dependent for multi-channel speaker setups.
Common Questions (5)
AI-generated summary based on comments from the community. Updated ago
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23 Comments
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Do you play loud or moderate? Most solid state amps sound the same until stressed. Klipsch speakers are relatively easy to drive. High sensitivity and impedance if you aren't stressing your current amps, the money would be better spent elsewhere.
Balanced connections typically cost more. Much more. 💡
*In this case it's listed under product description (1st tab)
Check out a poster named Amir who reviews mid to flagship AVRs. While I don't think he tested your AVR I'm pretty sure he tested the Yamaha RX-A1080.
https://www.audioscienc
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