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Monolith by Monoprice M7100X 7x 90W/ch Home Theater Power Amplifier
$325
$650
50% off
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Monoprice has Monolith by Monoprice M7100X 7x90 Watts Per Channel Multi-Channel Home Theater Power Amplifier with RCA & XLR Inputs (43866) on sale for $649.99 - 50% with promo code SHOP50 in cart = $324.99. Shipping is free.
Thanks to Community Member vid1900 for sharing this deal.
Details:
Thanks to Community Member vid1900 for sharing this deal.
Details:
- 7-channel Class AB power amplifier
- 90W per channel into 8 ohms, all channels driven
- THD < 0.02% with SNR > -100 dB
- Unbalanced RCA and XLR inputs
- 3RU height
Editor's Notes
Written by SaltyOne | Staff- Rated 4.9 out of 5 stars from customer reviews.
- At the time of this posting, our research indicates that this is $195 lower than the next best comparable online prices starting from $519.99.
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Monoprice has Monolith by Monoprice M7100X 7x90 Watts Per Channel Multi-Channel Home Theater Power Amplifier with RCA & XLR Inputs (43866) on sale for $649.99 - 50% with promo code SHOP50 in cart = $324.99. Shipping is free.
Thanks to Community Member vid1900 for sharing this deal.
Details:
Thanks to Community Member vid1900 for sharing this deal.
Details:
- 7-channel Class AB power amplifier
- 90W per channel into 8 ohms, all channels driven
- THD < 0.02% with SNR > -100 dB
- Unbalanced RCA and XLR inputs
- 3RU height
Editor's Notes
Written by SaltyOne | Staff- Rated 4.9 out of 5 stars from customer reviews.
- At the time of this posting, our research indicates that this is $195 lower than the next best comparable online prices starting from $519.99.
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Top Comments
If you want to see how a bunch of the new receivers only put out ~30 watts when they go into a secret 'limp mode' with no indication that you are not getting the 135wpc you paid for......
Even if you forget and leave the internal amps on, the heatsink fans will never come on because they are not actually under load.
https://www.audioscienc
The 30wpc that you are currently getting from the receiver seems loud, but you are missing out on the dynamic peaks that can be 100w, even on moderate volume movie watching.
Community Reviews
The Monolith 7 channel amp is mainly a headroom and expansion piece for home theater setups, especially when an AVR is hitting low power limits or needs extra channels. It can run cool, add dynamics, and help with future Atmos or 7.2.4 upgrades, while some setups barely change because the receiver already has enough power. The main cautions are reported hum on some units, a two prong power cord, and occasional compatibility quirks. It fits best when the system truly needs external amplification.
Home theater owners adding channels for Atmos, because it can power extra speakers and free the AVR to run cooler.
Listeners with low-impedance speakers that dip hard, because the amp is described as stable enough to handle difficult loads and preserve dynamics.
Movie watchers who want more headroom at moderate-to-loud levels, because it can restore dynamic peaks that a receiver may compress.
Owners of older receivers that enter low-power protection, because this external amp is presented as a way around the 30-watt limitation.
Owners of receivers already driving their speakers comfortably, because several setups reported little audible change from adding it.
People expecting a silent rack, because the amp can produce a faint hum that may persist even after replacement.
Two-channel stereo listeners, because this seven-channel amp is overkill when only two channels are needed.
Buyers wanting a simple plug-and-play receiver replacement, because it is only an amplifier and still needs a preamp for volume and inputs.
Common Questions (5)
AI-generated summary based on comments from the community. Updated ago
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188 Comments
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A couple of years ago Monoprice had the dual 15" 3000w M215 sub on sale for $1000 shipped .
Kids on the internet were saying it was discontinued, clearanced, 'below cost', bla bla bla.....but nope, it was just a sale. They still sell it today (and now with the tariffs it's $3k).
Shows how much markup there actually is in Big Audio.
I might have taken a flyer were I just starting out in home theater but that was close to 25 years ago. My first AVR, the Onkyo TX-SR601 retailed for $500 if memory serves. I might have paid close to $325 back in the day. LOL!
If you have old 8Ω speakers, they might never go into limp....but 8Ω speakers are pretty rare nowadays.
The odd part is that there is no indication on the unit that you are in limp mode. The receiver just keeps working at the greatly reduced wattage.
edit: Correction, NOT most receivers but some receivers used to be, and I would consider this an (good) entry level amp. Many onkyo and pioneer are class D and several other companies have utilized class D before.
1) Class D is rather rare in an AVR. The only one that comes to mind from a mass market brand would be JBL's MA series. Care to name some more household examples?
2) One of the older knocks on Class D was SQ. This is no longer the case as the many owners of Buckeye amps can attest to!
3) Class D will typically be more expensive than the equivalent output Class A/B amp. This "rule" really hasn't changed in like forever!
One of the reasons I am curious about the Monolith amp's 4 ohm rating is stability as you suggested. What good is it to "help" an AVR that has limp mode if the amp connected to it is also "limping"? As I said before, very rarely will you pair "good" with "cheap".
1) Class D is rather rare in an AVR. The only one that comes to mind from a mass market brand would be JBL's MA series. Care to name some more household examples?
2) One of the older knocks on Class D was SQ. This is no longer the case as the many owners of Buckeye amps can attest to!
3) Class D will typically be more expensive than the equivalent output Class A/B amp. This "rule" really hasn't changed in like forever!
One of the reasons I am curious about the Monolith amp's 4 ohm rating is stability as you suggested. What good is it to "help" an AVR that has limp mode if the amp connected to it is also "limping"? As I said before, very rarely will you pair "good" with "cheap".
Thank you for your correction though, definitely not most Modern receivers. What Class D is more expensive than Class A/B? I don't see that at all, maybe depends on your definition of "equivalent". Almost every super high end amp in Class a a/b
Thank you for your correction though, definitely not most Modern receivers. What Class D is more expensive than Class A/B? I don't see that at all, maybe depends on your definition of "equivalent". Almost every super high end amp in Class a a/b
Some amps, like the USA assembled Buckeye, can be made to order with either modules.
There can be some good things about everybody using the same amp modules, like if Vanced Amps goes out of business, you can still swap out a module yourself and be back in business.
Or if a module in your McIntosh M1254 kicks it, you know you can get a replacement channel from the net, a lot cheaper than having Mac service it.
Thank you for your correction though, definitely not most Modern receivers. What Class D is more expensive than Class A/B? I don't see that at all, maybe depends on your definition of "equivalent". Almost every super high end amp in Class a a/b
If you compare the current JBL MA series against a "comparable" Class A/B AVR (of which 90% are), you will find their retail price much more expensive and offering less "value" and features compared to the typical Japanese brand (i.e. Onkyo, Denon, Yamaha, etc.)
The warning sign at my Imax theater for Oppenheimer said that peaks of 120db were to be expected, so I'd trust that sign over any kids on the internet telling me how loud a movie theater is.
I never said that, Superman said that.
A movie at 40% setting on my system is as loud as a commercial theater; and much cleaner.
Not sure why you think I'm a kid.
There were actually a lot of complaints about Oppenheinmer being too hot. https://www.reddit.com/r/Oppenhei...ally
Wtf does 40% mean? Have you calibrated your system? Is that 40% of reference? Most would calibrate their system so they know when they are at reference and not going over or doing so intentionally.
Have you measured the output on your speakers at seating distances? Do you know what dB level you like to listen at?
Have you measured the distortion on your speakers at your 40% listening level? Do you really know they aren't distorting at high output? Or is this just based on your feelings?
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Not sure why you think I'm a kid.
There were actually a lot of complaints about Oppenheinmer being too hot. https://www.reddit.com/r/Oppenhei...ally
Wtf does 40% mean? Have you calibrated your system? Is that 40% of reference? Most would calibrate their system so they know when they are at reference and not going over or doing so intentionally.
Have you measured the output on your speakers at seating distances? Do you know what dB level you like to listen at?
Have you measured the distortion on your speakers at your 40% listening level? Do you really know they aren't distorting at high output? Or is this just based on your feelings?
43% on my receiver is where my room is at thx reference level.
I have several Watt and Decibel meters, but no distortion reading equipment other than my O-scopes.
43% on my receiver is where my room is at thx reference level.
I have several Watt and Decibel meters, but no distortion reading equipment other than my O-scopes.
This conversation is pointless. You've past the age of being curious and you think you know it all. I'd recommend actually measuring your equipment and what the needs are and not base things on vibes, and especially not recommend others buy things based on your feelings about equipment.
ASR accepts no ads, no sponsorships, or paywalls....even their Youtube channel is ad and sponsorship free.
So if ASR shows repeatable evidence that a receiver locks into Limp Mode once a speaker's impedance dips below 4 ohms, then everyone here is free to examine the posted test results.
If you have evidence that his testing is flawed, you should post your evidence and your testing methodology.
None had the hum issue, IF it does just return it.... pretty simple.
TBH unless your surrounds are very inefficient and you regularly listen at very very high levels, this is way overkill.
Even then, the difference would likely be minimal at best, definitely not worth the cost.
If you're looking for a cheap solution, look up Fosi audio amps, get pretty good reviews and very very unlikely you would hear a difference(if at all)between this and those Fosi amps!
https://fosiaudio.com/products/fo...-amplifier
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What they don't tell you is "sound" results, they are clearly not the same thing.
There is clear evidence of that everywhere, including that very same ASR link.
If someone chooses to conflate "measured" results & "sound" results.
Completely their prerogative but it's only facts/evidence to those to choose to believe it is.
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