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frontpageTattyBear | Staff posted Oct 06, 2025 09:15 PM
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frontpageTattyBear | Staff posted Oct 06, 2025 09:15 PM

Monoprice Monolith M2100X Multi‑Channel Home Theater Power Amplifier

& More + Free Shipping

$300

$400

25% off
Monoprice
15 Comments 4,210 Views
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Deal Details
Monoprice has Monoprice Monolith Multi‑Channel Home Theater Power Amplifier (Various) on sale as listed below. Shipping is free.

Thanks to Deal Hunter TattyBear for posting this deal.

Available: Features:
  • 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 SubZero5 | Staff

Original Post

Written by TattyBear | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Monoprice has Monoprice Monolith Multi‑Channel Home Theater Power Amplifier (Various) on sale as listed below. Shipping is free.

Thanks to Deal Hunter TattyBear for posting this deal.

Available: Features:
  • 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 SubZero5 | Staff

Original Post

Written by TattyBear | Staff

Community Voting

Deal Score
+18
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Get Deal at Monoprice

Price Intelligence

Model: Monolith by Monoprice M2100X 2x90 Watts Per Channel Stereo Home Theater Power Amplifier with RCA & XLR Inputs

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Top Comments

fivil
221 Posts
107 Reputation
That's a really different product, these are class AB amps, not class D streamer/dac boxes.

It's like saying you can get a TPA3116 2 channel amp for $50, so the Vibelink no longer makes sense.
cscamp20
5074 Posts
242 Reputation
Apple and Oranges. this is a class A/B amp. VibeLink looks like a toy amp. Not hating, I have a Wiim Pro Plus.

14 Comments

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Yesterday 12:11 AM
49 Posts
Joined Jun 2017

This comment has been rated as unhelpful by Slickdeals users.

Yesterday 12:55 AM
460 Posts
Joined Mar 2011
stuukeYesterday 12:55 AM
460 Posts
What do you recommend for a 3 channel?
1
Yesterday 01:01 AM
21 Posts
Joined May 2016
eksplosivejoe13Yesterday 01:01 AM
21 Posts
Quote from kclerie :
At the price of a Wiim VibeLink, this no longer makes sense. Maybe the 5 and 7 channel, but definitely not the 2 channel.
The Wiim VibeLink is the same price as the 2 channel.
Yesterday 01:02 AM
221 Posts
Joined Dec 2007
fivilYesterday 01:02 AM
221 Posts
Quote from kclerie :
At the price of a Wiim VibeLink, this no longer makes sense. Maybe the 5 and 7 channel, but definitely not the 2 channel.
That's a really different product, these are class AB amps, not class D streamer/dac boxes.

It's like saying you can get a TPA3116 2 channel amp for $50, so the Vibelink no longer makes sense.
Yesterday 01:17 AM
5,074 Posts
Joined Sep 2012
cscamp20Yesterday 01:17 AM
5,074 Posts
Quote from kclerie :
At the price of a Wiim VibeLink, this no longer makes sense. Maybe the 5 and 7 channel, but definitely not the 2 channel.
Apple and Oranges. this is a class A/B amp. VibeLink looks like a toy amp. Not hating, I have a Wiim Pro Plus.
Yesterday 03:16 AM
256 Posts
Joined Nov 2005
rimmi2002Yesterday 03:16 AM
256 Posts
Are this 90 watt amps the same as the 200w monolith amps with just lower power?
Yesterday 12:18 PM
983 Posts
Joined Aug 2011
StaticksYesterday 12:18 PM
983 Posts
Why list it as "multi-channel" when it's just stereo?
2

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Yesterday 02:41 PM
953 Posts
Joined Oct 2008
iamavenYesterday 02:41 PM
953 Posts
Quote from Staticks :
Why list it as "multi-channel" when it's just stereo?
The product line is multichannel, but the individual product page has stereo as the heading

Quote :
Monolith by Monoprice M2100X 2x90 Watts Per Channel Stereo Home Theater Power Amplifier with RCA & XLR Inputs
Yesterday 08:00 PM
22 Posts
Joined Aug 2010
CritterFLYesterday 08:00 PM
22 Posts
Quote from eksplosivejoe13 :
The Wiim VibeLink is the same price as the 2 channel.
Being Prime Day, the Wiim Vibelink is also on sale (like these are) for $239, so they are still less expensive. And the Wiims put out a few more watts. They are heavy and quite capable. Certainly NOT a toy. I've bought three of them (2 grey, 1 silver) and they look great paired with the Wiim Ultra, and sound GREAT with my Klipsch towers and bookshelf speakers. To each their own. Side note, I've held off on these cheaper Monolith amps mainly because the XLR inputs are NOT balanced like one would expect. They just convert the signal to unbalanced natively (like a cable adapter), so you lose on the 4 volts of headroom and only get to play with 2 volts from the RCA unbalanced...
Yesterday 09:32 PM
342 Posts
Joined Nov 2009
madmallardYesterday 09:32 PM
342 Posts
Quote from Staticks :
Why list it as "multi-channel" when it's just stereo?
because mono amps are a thing and stereo is multiple channels even if the total is 2.
Yesterday 11:49 PM
1,153 Posts
Joined Feb 2010
ROOSKIEYesterday 11:49 PM
1,153 Posts
Quote from cscamp20 :
Apple and Oranges. this is a class A/B amp. VibeLink looks like a toy amp. Not hating, I have a Wiim Pro Plus.
Well who cares?
Electronic fuel injection replaced the carburetor and for years folks were arguing.
Electric motors are not measured in displacement, they are tiny and produce massive power yet folks are still arguing V10 this or that.
Class A/B is just a technology, not a 'best in show'. It is now older and came years before folks could even conceive of making class d tech. It was not possible then or that is what would have been used.
A/B is wasteful turning 50-70% of the electricity into heat. D is typically much more efficient. Also the huge transformers A/B requires are made of metal and so are the heat sinks required to dissipate the generated heat and thus very heavy along with cases that are often designed to weigh extra for perceived quality at little extra manufacturer costs.
Just like a powerful laptop now weighs under 3 or even 2lbs. We don't weigh an amp to find out if it is good, you measure the level of variation from the signal going in vs the signal coming out and how much energy can be added to that signal. There is nothing more. Look at critical objective reviews and buy the correct product based on performance within your $ range. Some products will have more longevity vs others but that is hard to parse out.
1
Yesterday 11:49 PM
849 Posts
Joined Nov 2017
OrangeCaesarYesterday 11:49 PM
849 Posts
I picked up an open box M5100X 5x90 watts/channel for $299… total came to $346 with shipping.
Today 12:20 AM
94 Posts
Joined Jul 2019
NeatMeerkat520Today 12:20 AM
94 Posts
Tbh, they get much cheaper. Last November, I paid $295 for M7100X from Monoprice's website.
Today 12:27 AM
173 Posts
Joined Nov 2020
BraveMice4170Today 12:27 AM
173 Posts
Great price on a phenomenal amp. I've installed countless systems over the years using just about every known manufacturer, and the Monolith amps are as good as they come.
My current setup, after installing and configuring everyone else's, is:
  • Speakers:
    • 2X Klipsch Reference RF-7 III
    • Klipsch RC-64 III Center
    • 6X- Klipsch PRO-180RPC In-Ceiling Speakers
      • 4 Overhead Atmos, 2 rear surrounds
    • 2X- Klipsch PRO-180RPW In-Wall Speakers
      • Surrounds
    • 2X SVS PB 16 Ultra
  • Amplifiers
    • Monolith 7x200
    • Monolith 2x200
    • Monolith 3x200
Price for performance can't be matched with any other equipment combinations. When I hear everyone else debating about company A vs. B and this and that, I just tune it all out as background noise. Monoliths are the perfect sweet spot.

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