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    Monolith 3x200 Watts Per Channel Multi-Channel Home Theater Power Amplifier with XLR Inputs
    Product # 15594
    Out of Stock ETA: 2/28/2018


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    Monolith 3x200 Watts Per Channel Multi-Channel Home Theater Power Amplifier with XLR Inputs

    Monolith 3

    The Monolith 3 is a state-of-the-art, high-performance, audiophile-grade multichannel home theater amplifier. Rated at a full 200 watts per channel into 8 ohms and 300 watts per channel into 4 ohms, the Monolith 3 is capable of driving the most demanding home theater systems and reproducing the most dynamic soundtracks, while also articulating all the subtle sonic details found in music. Supercharge your existing receiver or create the foundation of a no compromise home theater system with the Monolith 3.

    Power | Dynamics | Clarity

    Class AB
    Class AB

    Power: A true 200-watt experience. Unlike most amplifiers or receivers, the Monolith's 200 watts per channel rating is measured with all seven channels driven across the full power bandwidth of 20Hz to 20kHz into 8-ohm loads. Additionally, there is NO current limiting and there is no protection circuitry in the amplifier circuit path. Even if the speakers' impedance drops to a low level, the Monolith is robust enough that the current is never limited.

    Dynamics: High resolution audio delivers the best in music and movie soundtracks. You deserve an amplifier capable of delivering clear and clean audio across a wide dynamic range! With a more than 120dB signal to noise ratio, the Monolith 3 can clearly and accurately articulate the quietest portions, the loudest portions, and everything in between.

    Class AB: More efficient than Class A, many high end, audiophile grade amplifiers utilize a Class AB design.

    Note that the following images show the Monolith 7 model. This model (Monolith 3) has 3 channels not 7, but is otherwise identical.



    No, it isn't a new villain in the next giant robot movie, this is the source of an amplifier's power. Each amplifier channel gets its own set of transformer windings, and also its own storage capacitor. Essentially, each channel has its own power supply – meaning if one channel gets maxed out, the other channels are not affected.

    Monolith 7


    Ever look behind a stereo rack and were aghast at the sight of the spaghetti entanglement of dozens of wires? Not here. Neat, clean wiring in tubing designed for the aerospace industry. Clean wiring. Clean layout. Better sound.


    Double sided, glass epoxy boards. Metal film resistors built to 1% tolerances. Stringent quality to ensure each circuit board functions like the last and presents the maximum in sound fidelity.

    Monolith 7


    These lightning fast, optically coupled circuits are designed to detect electrical shorts from either the speakers, speaker wire, or electrical outlet. If triggered, the circuit will disengage the output, protecting the amplifier. It will then sample the affected circuit every 10 seconds and will restore output when it is safe to do so. Unlike other designs where there is fuse or relay in series with the output, which can raise the damping factor or modify the sound, our protection circuitry monitors the signal actively, but does so optically from outside the circuit path.


    Oversized heat sinks, instead of fans, are used to keep the amplifier as cool and as silent as possible. After all, you bought this bad boy to hear the soundtrack, right? No fans means less dust. Less dust means a longer operating life for your equipment.

    Monolith 7


    A rugged chassis with a powder coated finish designed to resist scratches and prevent corrosion.


    The gold plated RCA jacks on the Monolith are mounted directly on the chassis, not on a separate internal circuit board. This allows for a firmer connection that won't loosen over time, or worse, break.

    Monolith 7
    Monolith 7


    Have you ever turned on your receiver or amplifier and heard a disturbing (and potentially damaging) "thump" come through your system? The Monolith is engineered with a soft start circuit that gradually powers up the unit, preventing the dreaded speaker thump, while also easing the load on household circuitry. Once fully powered, the circuit is removed from the signal chain to ensure maximum sonic clarity.

    5 Year Warranty


    Monoprice not only stands behind every product we sell with a 5 year replacement warranty, we offer a 30-day money back guarantee as well! If the product you purchase does not satisfy your needs, send it back for a full refund.

    Quality at a Fair Price

    Quality at a Fair Price

    Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.

    Service & Support

    Service & Support

    You're never on your own with Monoprice products! We have a full team of friendly and knowledgeable technicians available to answer your questions, both before and after the sale. Contact our technical support team for questions about our products, troubleshooting, or even suggestions for products to fit your particular needs. Not to be outdone, our friendly and helpful customer service team is here to make your ordering, delivery, and any possible returns a quick and painless operation, from start to finish!

    Model 15594
    Number of Channels 3
    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 1 (1,025VA)
    Total Capacitance 67,200µF (22,400µF per channel)
    Load Impedance 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 13.3" (432 x 178 x 338 mm)
    Net Weight 57.0 lbs. (25.9kg)

    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.

    Support Files:

    Note that the following manual and specifications are for the Monolith 7. This model (Monolith 3) has 3 channels not 7, but is otherwise identical.

    Start typing your question and we'll check if it was already asked and answered. Learn More
    Browse 5 questions Browse 5 questions and 11 answers
    Does this amp have any sort of auto power on when a signal is detected? Or must you physically press the front power button to turn on or off?
    f mchael m on Sep 8, 2017
    BEST ANSWER: Yes. From the manual: "...this amplifier features a low voltage trigger input." You can get the user's manual from the product's "full specs" tab.
    How long is the power cord on this amps? thanks
    New User U on Aug 30, 2017
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    BEST ANSWER: I think it's either 6' or 8' long. I have too many speakers, wires & electronics in the way to tell for sure. Either way, it didn't reach my outlet, so I used power surge strip, of which Monoprice has many. Here's a good one, for example: https://www.monoprice.com/product?p_id=11146. I love, Love, LOVE the amp. I have the Monolith 5 (200x5) and an Emotiva XPA-5 Gen 3 (250x5) .... I prefer the rich, powerful sound of the Monolith over the Emotiva...just my two cents.
    Is there a photo or drawing of the rear panel for the Monolith 3?
    A shopper on Mar 15, 2017
    BEST ANSWER: The back panel of the Monolith 3 is EXACTLY the same as pictured for the Monolith 7, except that it does not contain inputs or speaker connections for right back, right surr, left surr, or left back. Those areas of the back panel are just plain black metal on the Monolith 3.
    Monolith 7x200 Watts Per Channel Multi-Channel Home Theater Power Amplifier with XLR Inputs
    Monolith 7x200 Watts Per Channel Multi-Channel Home Theater Power Amplifier with XLR Inputs
    Amp manual says "Do not plug amp into a switched outlet on preamp or other audio equipment". Does this include a power conditioner?
    A shopper on Dec 15, 2016
    BEST ANSWER: I have my Monolith 7 connected to a Marantz 7702mkII pre-amp. It's switched on via a remote trigger connection between the two units. I upgraded the stock power cords with Audioquest NRG-4's and both are connected to a Furman Elite PF15 power conditioner . No problems whatsoever. I turn on the pre-amp and the pre-amp turns on the Monoprice Monolith. I surmise the manual is cautioning against users experiencing power surges through switched outlets, etc.
    Will this amp work with 230v 50hz power supply? For example in the UK.
    A shopper on Aug 11, 2017
    4.8 / 5.0
    6 Reviews
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Exactly what you expect
    This thing is a beast. I use it to power my front 3 speakers in a 7.3.4 Atmos system.

    My only complaint is that there is no standby setting and it’s really not feasible to use a switched outlet without another power component that offers a switched plug. So either you leave it on when you aren’t using it or you manually push the power on off button.

    I have yet to find a situation where it did not have enough power or have I ever reached the point of clipping or distortion. I doubt I ever will.
    October 9, 2017
    5 months ago
    Power house!
    This amp is really nice piece of equipment.
    Nothing feels cheap to me.
    Really heavy! One single light ring on the front to tell you it's on.
    My JBL towers are two 8" n tweeters. 210 watt max.
    The center channel is two 6" n tweeter. 160 watt. Max. All at 8 omhs.
    Perfect match to me.
    Nothing to hooking it all up.

    Movies are now have that head room for explosions etc.

    Dialog is much better.

    Glad I purchased it.

    Just wish they made 6 n 8 channel 75 watt. Amp for the object speakers.

    December 13, 2017
    2 months ago
    Great amp
    Great sounding, high quality amp at fantastic price!
    January 20, 2018
    1 month ago
    No competition
    I was searching for power amplifiers for months. My intent was to add outboard amplification to my existing Marantz SR5010 receiver. I was looking into mainly 2 channel and 3 channel power amplifier products. On this particular system, I listen to music 70% and movie content about 30%. Tops on my amplifier list were the following; Monoprice, Emotiva, Parasound, Outlaw Audio, Marantz and various used Carver and Rotel products. Purchased this unit at a reduced black Friday price and I couldn't be happier with the purchase. The amplifier added incredible dynamic range, increased almost effortless volume sound pressure level and clean power to my existing system. The unit does NOT run very hot, it runs quite a bit cooler than my Marantz SR5010. When I plugged it in, I experience a ground loop with my cable tv plug on the wall - a humming noise coming from the speakers and slight humming noise from the amplifier itself. I thought the amplifier was problematic however I was able to fix the hum with a ground loop isolator product which plugged inline from the coax cable outlet to my cable box receiver. The amplifier is now dead silent. The 12 volt trigger cable from the amp to the receiver works every time I turn on the receiver. The build quality is exceptional and heavy - exactly what a good power amplifier has always been - heavy. I cannot think of any CONS to this product. For the price I paid for this, this is a five star product if I have ever seen one. I am pairing this with a set of 10+ year old Polk Audio RTI8 speakers which I plan to replace in the near future. Good job on this product Monoprice.
    December 5, 2017
    3 months ago
    Beautifully built amplifier that puts out smooth, continuous power at real ratings!
    Had to change out our existing stereo amplifier for one that would push three channels. Was concerned as the speakers we have are very inefficient at four ohms and require a lot of power to drive them. This has done more than I expected, with plenty of headroom and smooth, Rich sound. Would highly recommend.
    December 27, 2017
    2 months ago
    Solid amplifier
    This amplifier is a solid performer, but I can't hear much of a difference when compared to my existing (Tandberg 3026A) amp at 150w/channel. The biggest downside is the weight ...over 50 lb so it can only go on a reinforced shelf, and you will need help getting it there. No performance issues.
    November 7, 2017
    4 months ago


    Back Order This item should ship tomorrow (2/26/2018) if ordered within 6 hours 26 minutes