Item 1 of 4
Item 1 of 4
frontpageTattyBear | Staff posted Oct 6, 2025 9:15 PM
Monoprice Monolith M2100X Multi‑Channel Home Theater Power Amplifier
$300
$400
25% off
& More + Free Shippingat Monoprice
& More + Free Shippingat MonopriceDeal 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:
Thanks to Deal Hunter TattyBear for posting this deal.
Available:
- M2100X 2x90 Watts Per Channel (43863) $299.99
- M3100X 3x90 Watts Per Channel (43864) $349.99
- M5100X 5x90 Watts Per Channel (43865) $449.99
- M7100X 7x90 Watts Per Channel (43866) $549.99
- 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- About this deal:
- Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
- Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
- About this store:
- Details of Monoprice's return policy (here)
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:
Thanks to Deal Hunter TattyBear for posting this deal.
Available:
- M2100X 2x90 Watts Per Channel (43863) $299.99
- M3100X 3x90 Watts Per Channel (43864) $349.99
- M5100X 5x90 Watts Per Channel (43865) $449.99
- M7100X 7x90 Watts Per Channel (43866) $549.99
- 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- About this deal:
- Get 1%-5% cash back on deals like this with a cash back credit card. Compare the available cash back credit cards here.
- Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
- About this store:
- Details of Monoprice's return policy (here)
Community Voting
Deal Score
+32
Good Deal
Bad Deal
Price Intelligence
Model: Monolith by Monoprice M2100X 2x90 Watts Per Channel Stereo Home Theater Power Amplifier with RCA & XLR Inputs
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
- $NaN
- Today
Current Prices
Sort: Lowest to Highest | Last Updated 7/17/2026, 01:34 AM| Sold By | Sale Price |
|---|---|
 NewEgg | $319.99 |
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Top Comments
It's like saying you can get a TPA3116 2 channel amp for $50, so the Vibelink no longer makes sense.
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31 Comments
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It's like saying you can get a TPA3116 2 channel amp for $50, so the Vibelink no longer makes sense.
Sign up for a Slickdeals account to remove this ad.
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.
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.Sign up for a Slickdeals account to remove this ad.
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.
Join The Conversation
Share information with the community. Please follow our Community Guidelines and be kind!