Item 1 of 2
Item 1 of 2
expiredvid1900 posted Jul 27, 2026 7:44 PM
Monoprice Monolith M2100X 2x90 W/Ch Home Theater Power Amplifier
$200
$400
50% off
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Monoprice has Monoprice Monolith M2100X 2x90 Watts Per Channel Stereo Home Theater Power Amplifier (43863) for $399.99 - 50% off w/ promo code MOVE50 in cart = $199.99. Shipping is free.
Thanks to Community Member vid1900 for finding this deal.
Features:
Thanks to Community Member vid1900 for finding this deal.
Features:
- 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 johnny_miller | Staff- About this deal:
- Our research indicates this offer is $120 lower (37.5% savings) than the next best price from a reputable merchant at the time of this post.
- This offer matches a recent Frontpage Deal.
- Please see the original post for additional details & give the forum comments a read for helpful discussion.
- About this product:
- Rating of 4.7/5 from Monoprice customer reviews.
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Monoprice has Monoprice Monolith M2100X 2x90 Watts Per Channel Stereo Home Theater Power Amplifier (43863) for $399.99 - 50% off w/ promo code MOVE50 in cart = $199.99. Shipping is free.
Thanks to Community Member vid1900 for finding this deal.
Features:
Thanks to Community Member vid1900 for finding this deal.
Features:
- 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 johnny_miller | Staff- About this deal:
- Our research indicates this offer is $120 lower (37.5% savings) than the next best price from a reputable merchant at the time of this post.
- This offer matches a recent Frontpage Deal.
- Please see the original post for additional details & give the forum comments a read for helpful discussion.
- About this product:
- Rating of 4.7/5 from Monoprice customer reviews.
Community Voting
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Price Intelligence
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.
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Top Comments
Monoprice does occasionally have "b-stock" and "open box" sales; but this is not one of them.
Puts up some pretty good specs on the bench:
https://downloads.monop
The rz30 only puts out 36 watts per channel into a 4 ohm speaker.
The Monolith puts 135 watts per channel into a 4 ohm speaker.
All those extra watts gives you lots of clean headroom for big dynamic swings.
https://www.audioscienc
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54 Comments
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https://slickdeals.net/f/19715778-monolith-7-ch-amp-90-135wpc-fs-325?src=SiteSea
More channels than you need...but definitely has more if you want to grow and makes the price per channel much better
This should also be 4 ohm capable and get you more performance than the RZ30..or frankly any sub $1200 ish AVR
Our community has rated this post as helpful. If you agree, why not thank vid1900
The rz30 only puts out 36 watts per channel into a 4 ohm speaker.
The Monolith puts 135 watts per channel into a 4 ohm speaker.
All those extra watts gives you lots of clean headroom for big dynamic swings.
https://www.audioscienc
Granted, my aventage is an older model, but I had to turn on "low impedance" mode in order to power my elac ub5s, which are 4 ohm. AI thinks that that mode added extra protection against overcurrent and that was what was holding my speakers back (the ub5 gen 1 are notoriously power hungry).
It also kept mentioning how the damping factor on the m2100x is vastly superior to the damping factor on my avr. Not sure EXACTLY how or why this improves sound quality, but this amp just sounds WAY better than my Yamaha AVR as a power amp.
I swear to you… if you can still get this for $200, it's worth the cost easily. You won't regret it.
The rz30 only puts out 36 watts per channel into a 4 ohm speaker.
The Monolith puts 135 watts per channel into a 4 ohm speaker.
All those extra watts gives you lots of clean headroom for big dynamic swings.
https://www.audioscienc
Our community has rated this post as helpful. If you agree, why not thank vid1900
I like when manufacturers conservatively rate their products; rather than give some pie-in-the-sky numbers that crap out on the test bench.
Also, what would be the most cost effective way to add an active amp to this setup?
Would this be a worthwhile upgrade from the cheap $200 Sony STRDH190 receiver? I have two JBL 570 floor standing speakers I absolutely love and I fear I may have cheaped out on the receiver a little too much.
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With so many people switching to soundbars, you can find really good deals on older quality AVRs ime.
Nothing fancy needed for 2 channel and switching sound signatures will likely help also.
Our community has rated this post as helpful. If you agree, why not thank vid1900
Your JBLs are 6 ohm speakers, so they would not put any strain on the 4ohm rated Monolith.
Later in life, if you ever get a new receiver, you would then use the Monolith with it.
Receivers quickly become obsolete as new digital formats come out every couple of years - but quality amplifiers never become obsolete.
You still see those vintage 70s amps with their giant VU meters on the front, connected to the receivers of today. Not many tech products have half century lifespans besides amplifiers.
No 12v turn-on or xlr inputs though, and the Monolith delivers quite a bit more power in the CEA 2006 tests.
In real world use, you really wouldn't hear a difference unless maybe you listen at rock concert levels ime.
In that scenario, personally I'd stick to the smaller footprint.
The listed benefits on this aren't really a sonic benefit ime.
Granted, my aventage is an older model, but I had to turn on "low impedance" mode in order to power my elac ub5s, which are 4 ohm. AI thinks that that mode added extra protection against overcurrent and that was what was holding my speakers back (the ub5 gen 1 are notoriously power hungry).
It also kept mentioning how the damping factor on the m2100x is vastly superior to the damping factor on my avr. Not sure EXACTLY how or why this improves sound quality, but this amp just sounds WAY better than my Yamaha AVR as a power amp.
I swear to you… if you can still get this for $200, it's worth the cost easily. You won't regret it.
Get a good sound processor and pre-amp. Cheap processors add resistors to the speaker's outputs and call them pre-amp outs. Use one or more quality 2 ch amplifiers to power the speakers.
Most AVRs drop the main supply rail voltage when engaging low impedance mode. This allows the receiver to meet UL cert without overheating. Old school stuffs like my SX-1250 (160W RMS into the full audio bandwidth) don't need to switch to 4 ohm mode. I have no problem identifying the SX-1250 vs modern receivers, even with my old ears.
Get a good sound processor and pre-amp. Cheap processors add resistors to the speaker's outputs and call them pre-amp outs. Use one or more quality 2 ch amplifiers to power the speakers.
I gave up on having a full AVR setup in my living room due to the open floor plan - the wife didn't want speakers placed in various places. I'm running a JBL Bar 1300X for video/HTR sound and am using the ZD3/M2100X for 2 channel music.
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The monos frankly just didn't sound very good. Channel separation was decent but that's about it. They sounded very unnatural to me.
I also have a topping mini300 and I thought that it sounded better than the monos - I'm not a class D hater.
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