Volume Pricing (Log In to see Member Pricing)
|Inputs||7x unbalanced RCA, 7x balanced XLR|
|Number of Channels||7|
|EIA 1kHz Output Power at 8 Ohms*||250 watts|
|EIA 1kHz Output Power at 4 Ohms*||375 watts|
|FTC Full Bandwidth Output Power at 8 Ohms**||200 watts|
|FTC Full Bandwidth Output Power at 4 Ohms**||300 watts|
|Input Sensitivity for Full Rated Power||1.6 volts|
|Frequency Response at Rated Output||20Hz to 20kHz ±0.1dB|
|Phase Response||+5 to -15 degrees from 20Hz to 20kHz at 1 watt|
|Signal-to-Noise Ratio "A-Weighted"||Greater than 120dB below rated FTC Full Bandwidth Power|
|Total Harmonic Distortion (THD)||
Less than 0.03% at full rated FTC power
Less than 0.005% at full EIA power at 1kHz
|Intermodulation Distortion (IMD)||
Less than 0.03% at full rated FTC power
Less than 0.005% at full EIA power at 1kHz
|Toroidal Transformers||2 (1,230VA and 1,025VA)|
|Total Capacitance||156,800µF (22,400µF per channel)|
Safe with all types of loads
Rated for 4 to 16 ohms
|Power Bandwidth||FTC +0, -3dB from 5Hz ~ 100kHz|
|Damping Factor||Greater than 400 from 10Hz ~ 100kHz|
|Crosstalk||Greater than 100dB from 20Hz ~ 20kHz|
|Gain||Voltage gain of 28dB|
|Slew Rate||> 50V / µS|
|Input Impedance||28 kilohms (nominal)|
|Remote Trigger Voltage||3.3 ~ 24.0 VDC at 5mA or greater|
|DC Output Offset||Less than ±5mV|
|Input Power||120 VAC (nominal)|
|Chassis Dimensions||17.0" x 7.0" x 16.5" (432 x 178 x 419 mm)|
|Net Weight||93.2 lbs. (42.3kg)|
All power ratings are measured with all channels driven.
* EIA 1kHz Power refers to maximum average power in watts at 1kHz with 0.005% THD and noise.
** FTC Full Bandwidth Power refers to maximum average power in watts from 20Hz to 20kHz with 0.03% THD and noise.
Questions and Answers
Idle Power Draw (±5W)
Monolith 7 – 170W
Monolith 5 – 125W
Monolith 3 – 80W
Monolith 2 – 60W
As for the Monoprice power amp, I’ve been using it daily since last May and it’s been performing very well. I’m certainly not an electronics expert, but I have not noticed it producing any remarkable “cooling ease” on either the Denon 3311CI I had been using with it nor on the Marantz 7702 mk II, which I now use as a pre-amp with the Monolith. I can report the Monoprice has performed admirably and for its comparatively low price, the 200+ watts per channel of serviceable power is a fine bargain. I do quite a bit of 2-channel listening and am not terribly interested in an Atmos configuration, so I use its seven channels in a 5.1 surround system, utilizing the two extra channels in a bi-amp configuration with my Vandersteen IICE signature 2’s. I’ve been quite satisified.
Overall I am very happy with the punch this amp delivers to my speakers. And the price is hard to beat.
24" x 24" x 12" (LxWxH)
Really for the price and you what you get for it, you basically would have a hard time doing better. Would you even hear the difference at the twice the price? Few if any could.
Being a Steely Dan fan, I put this amp through the paces and it did the job. Detailed, accurate, and powerful. No hint of color to the sound!
Movies were next and I turned it up to 11 (actually probably closer to 4) no problem. Never felt like it was fatigued. Heck I wondered the monolith was laughing at me saying "...that's all you got?!".
Well after 50 years my ears are not what they used to be but there but there's certain songs and movies that I know very well and the monolith did the job excellently and managed to just get out the way.
Hookup was nice. The trigger input was also a nice touch, especially the fact that it accepted a low voltage of ~3v which is unusual as most are 9v+. This allows one to use USB on those receives (like Onkyo) that lack triggers for the primary zone.
The back panel has lots of room and laid out logically. Made it easy to hookup.
PROS: Neutral high power sound. The very definition of clean power and provides the headroom I've been looking for.
Quality at an excellent price.
Did I need 7 channels. Heck no! But you know what they say,buy the biggest amp you can, you will grow into it (maybe that saying is about buying a home...oh well).
CONS: Not really cons, but you know, you gotta complain about something!
It's really Heavy. I couldn't lift it entirely. Used a dolly to get it into LR and then one side at time into entertainment center.
Runs Hot - yeah, all electronics do, but this one is really hot. Not surprising. Unless you run this in an open rack, plan on adding some low noise fans on top.
Doesn't keep my beer cold.
Scares my cat and pisses off my wife when in use.
Can't charge my Tesla.
Enter the concept of the dedicated AV power amp. Only a few short years ago, you wouldn't even dream of playing with the big boys in this arena unless you had something red and Italian in the garage (other than a Vespa), and an extra zero in your system budget. Monoprice's new Monolith series brings this very concept to a whole new bevy of consumers, myself included, and with no compromises. Now one can pick up their choice of Monolith for a song and trust that in 40 years, the Monolith will not only still perform as it did day one, but with its absolutely audiophile-grade Class AB topology for the true aural addict, will still be at the upper echelons of quality such that one's children would be all but spoiled to inherit it.
With the Monolith keeping your sleep sound and upgrade-itis at bay, you’re simply left to keeping up with the technology Joneses via modest receiver or pre/pro investment every so often. When Sound & Vision's David Vaughn lauds the Monolith as a bargain, it should be all the reason you need to jump… If you need a little more incentive, wait occasionally for Monoprice’s discount emails, and pray it applies to the Monolith series – a rare, but worthy payoff for your patience!
I almost forgot… As far as the product itself, there’s little more to be said than what David Vaughn wrote in his article. Yes, the Monolith stupid-heavy, it will run hot - I’d also measured standby power draw around 160W, and yes there’s the modest price of admittance if you’ve not prior considered the concept of a separate amp, but I’d bet a testicle (I mean, who really needs two?! Lance “Juan Pelota” Armstrong has how many kids now??) that Unicorns have been sold for less than what this amp delivers.
It’s. That. good. My listening friends, my girlfriend, and my Axiom M80v4 HP’s agree, and I think you will as well. Plus, it’s American-made to boot! Make America great again?! Monoprice for President!
…and Monolith for your next upgrade.
PROS: - Audio bliss at seemingly limitless power levels, especially with a dedicated 20A circuit driving low-impedance loads.
- Absolute. Fuggin. Bargain.
- Too heavy to steal.
- Trigger and soft start features are nice touches.
CONS: - Almost too heavy for your girlfriend to lift into place for you. Almost. Should actually be a wifey test. If she can, add a tick mark to the "put a ring on it" column.
- Lack of XLR inputs... but I say that in jest. Unless you're running 100ft signal cables and/or reproducing content with over 120dB in range, let alone a pre/pro that can reproduce it, this is by far the dumbest "con" ever. Plus, most XLR inputs are not truly balanced, and all but the most insanely priced, high-end pre/pro's do not incorporate TRULY balanced outputs either! Do the research and you'll see, XLR's are basically a gimmick outside of pro audio applications.
If I'm critical of few things, then (1) the amp runs really really hot. After about an hour of operation, the heat gets to a level that you can burn your hand over it. Definitely, need a separate AV equipment cooling system with this amp. I placed AC Infinity 17-inch wide S8 fan over it, and it runs cool and perfect. (2) back panel of the amp indicates "Designed and Engineered in USA", but it does not indicate where it was manufactured. One could easily think that the amp is manufactured somewhere in China or India to keep the cost low for the spec. However, after doing some research, it is actually manufactured at the ATI facility in the Sunny ?? Southern California..Monoprice should definitely consider stamping "Made in USA ???? " on the back panel of the amp. ATI manufacturers hog-end amps and this should definitely be a plus for Monolith (3) lack of balanced inputs..
Overall, best sounding amp. This amp will give Emotiva or Outlaw run for its money.....
12 months ago
1 year ago
PROS: Build quality
No balanced inputs
I liked the idea of no fan (quiet) and the "anti-thump" start up. I received the box (double boxed) and yes, it is a massive beast. I was able to get it out of the box myself, but I would not recommend it.
I have not really had a chance to assess its sonic qualities much yet (I will try and update this as I go), but can attest the unit arrived in perfect condition, extremely solid, and worked perfectly the first time powered up. I have it coupled with a Marantz premium 11.2 pre-amp (model escapes me right now, but it is the one for about $2300). The low voltage power-up interlink works perfect, and there will definitely be some heating support from the unit this winter (it was not super hot, but you can tell it is creating heat that the massive heat sinks dissipate).
Sound quality seemed extremely solid to start, but like I said I haven't really had time to assess the nuances yet (been working too much!).
What I wanted to get across in this basic review was I think it is a tremendous value, very solid, Monoprice delivered quickly and professionally, sounds great, and works flawlessly.
(if you were ever burglarized, I guarantee the thief would not be running off with this amp unless they brought a dolly!
CONS: No "balanced" inputs, if you really need that.
11 months ago
After hooking it up it sounded better than my adcom.
Better directionality of the sound effects on my goto demo disks, didn't muddy the sound stage as volume increased and it just sounded more detailed.
Pros: Cheaper, better sounding and more channels than my previous adcom
Cons: Heavy as $@*!, but that is typical of something of this build quality.
1 year ago
PROS: Great value
Excellent build quality
can drive just about any load
CONS: VERY HEAVY (Understandably so)
No XLR connections