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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.
Common Questions (5)
Some units reportedly have a faint hum that can persist even after replacement, while others are silent from normal listening distance. Standby behavior also varies in reports: one measurement showed about 38W when turned off, while another setup showed 0W on standby and about 100W in operation.
It can help when the AVR is current-limited into low-impedance loads, because the external amp can supply more headroom and preserve dynamic peaks. For typical listening levels, though, several comments say the difference may be small unless your speakers are hard to drive or you listen very loudly.
Yes. The Denon 4300 can use amp assign or pre-outs to feed an external amp, but it does not have dedicated independent preamp mode; the 3800 does, which makes it more useful if you want to offload selected channels and reduce heat or power draw.
For normal movie listening at comfortable levels, 90WPC is usually enough, especially with moderately sensitive speakers and a subwoofer. Several comments note that many setups never approach the power where this amp matters, and that the bigger gains often come from room correction, speaker choice, or adding subs.
Yes. It is only a power amplifier, so it needs a preamp or AVR with pre-outs for volume control, input switching, and source management; it does not provide turntable or CD inputs on its own.
AI-generated summary based on comments from the community. Updated ago
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188 Comments
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Ai says: The AVR-X4300H Problem: The internal amplifiers are permanently tethered to the pre-outs. As you turn up the volume to feed your external amp, the X4300H's internal amplifiers run out of headroom and begin "clipping" at roughly 1.2 to 1.4 Volts. This heavy distortion bleeds directly back into the preamp stage, muddying the sound before it even reaches your external amplifier.
Is that true and does it mean it would be better to use the onboard avr amp vs the monoprice with the 4300?
I have not read all of Amir's reviews, but I got a used Pioneer 505 cheap when my favorite local audio store got it in trade because of the Limp Mode.
Since I have a rack of quarter century old Parasound 3500 amps (500wpc into 4 ohms), the Pioneer was perfect for me, since I don't need to use the internal amps.
Receivers are junk tech that quickly becomes outdated and replaced constantly. Quality amps are good for decades (well, at least until I have to re-cap them, lol)
The Denon X3800 failed..the Onkyo RZ50 failed
I am betting the Onkyo RZ70 would pass based on the Audioholics numbers
But I dont think Amir's has ever tested that unit
The Denon X4800 did pass...but I would say barely, based on some of the wording of his review
BUT that crowd(and similar ones on the various AV forums) are really looking at products at much higher price points when they start picking apart those tests/results
Ai says: The AVR-X4300H Problem: The internal amplifiers are permanently tethered to the pre-outs. As you turn up the volume to feed your external amp, the X4300H's internal amplifiers run out of headroom and begin "clipping" at roughly 1.2 to 1.4 Volts. This heavy distortion bleeds directly back into the preamp stage, muddying the sound before it even reaches your external amplifier.
An A/B class amp circuit with no load, is only going to be drawing it's idle current .
If you think about it, the average Joe is only using 5 of the 11 channels of amplification on his receiver. Does anyone imagine that those 6 unused channels are just blazing away 800w of energy into the room? No way, that would be insane.
Is that true and does it mean it would be better to use the onboard avr amp vs the monoprice with the 4300?
But if you want a science project:
Disconnect one lead from all the speaker terminals
Plug the receiver into that old "dr watt" or "kill a watt" you have had sitting in the junk drawer
https://www.amazon.com/Electricit...B0
Put the volume at 100%
Laugh at how little energy the receiver is using without a load.
I think you're missing the point.
FYI those internal amps continue to draw power while using pre outs, they do not turn off(ie preamp mode).
Even if the internal amps are all powered up, without an actual load, they are only going to draw their idle current.
Let's say that a typical A/B class amp might have a 20mA idle current, so add up 11 unloaded channels and we are drawing less than a quarter of an amp.
The Pioneer 505 draws 43 watts while playing back a Blu-ray with no speakers connected.
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https://ibb.co/Z16jQWPx
I have my whole rack on a physical power switch, but holy crap is that a lot of wasted power if you guys are leaving your receivers in standby mode all the time.
Imo if you go external go big, just for the speakers that need them.
If/when you upgrade loudspeakers, efficiency becomes pretty irrelevant for the most part.
So does any benchmark specs to internal power supply.
I do love that my 3800 as a pre pro, with D-ART is sonically better than all these flagship AVRs
Good luck and enjoy!
You said you go to ASR for "audio reality".
In reality that's listening.
Hence why I asked when you "heard" this limp mode issue.
Sorry I thought it was obvious.
You said you go to ASR for "audio reality".
In reality that's listening.
Hence why I asked when you "heard" this limp mode issue.
Reviews on this amp are very mixed and sparse, so I'm wondering if it has QC issues. Audioholics declined to publish testing results for the M7100x (beta revision) back in 2024. Negative reviews I've found all seem to be from 2024 as well. Wondering if Monoprice fixed the design since 2024.
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In my theater, I have 7 floor speakers and 7 ceiling speakers. It really works well.
The Marantz 7013 controls 7 floor, and the rear back atmos ceiling speakers. My Harman Kardon AVR635 controls 2 front atmos ceiling speakers and 3 front ceiling speakers as mains.
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