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Monoprice

Monolith THX AAA Balanced Headphone Amplifier Featuring THX AAA 887 Technology, Balanced and Single-Ended Inputs

  • Based on 65 reviews
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Availability: In Stock.
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Features

  • The THX Achromatic Audio Amplifier (THX AAA) ensures the ultimate no compromise headphone audio experience by delivering the fidelity audio with infinitesimally low levels of noise, distortion, and power consumption.
  • Three gain settings: The amplifier features three different gain settings for optimal compatibility with all headphones. The lowest gain setting is the most appropriate for sensitive IEMs.
  • Balanced and single-ended inputs: The amplifier features an XLR balanced input, plus 1/4in and 3.5mm single ended inputs to eliminate the need for adapters.
  • High grade CNC-milled aluminum with black anodized finish chassis material.
  • 50 kilohms input impedance.
  • Connector type: 4-Pin Mini DIN

Description

The THX Achromatic Audio Amplifier (THX AAA) ensures the ultimate no compromise headphone audio experience by delivering the world's highest fidelity audio with infinitesimally low levels of noise and distortion. Use three different gain settings for optimal listening with sensitive IEMs and headphones. Capable of powering even the most demanding headphone, the Monolith by Monoprice THX AAA Balanced Headphone Amplifier featuring THX AAA 887 Technology delivers an audio experience like no other.

Compatible Devices: Headphone


Specific Uses For Product: Amplifier


Connector Type: 4-Pin Mini DIN


Color: Black


Item dimensions L x W x H: 15.6 x 11.9 x 3.5 inches


Product Dimensions: 15.6 x 11.9 x 3.5 inches


Item Weight: 5.4 ounces


Item model number: 139359


Date First Available: June 14, 2020


Manufacturer: Monoprice


Country of Origin: China


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: within 30 days

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Nice upgrade to 789
Love my Schiit Jotunheim 2 for its musical warmth, soul, and engagement. I added a THX 789 to my rack because I wanted a clean, detailed, reference amp to complement it. I liked the 789 for orchestral music especially due to its clean detailed presentation, but it sounded harsh in the highs to my ears, even paired with my warm DAC (the original Modi Multibit, using RCA to XLR cable). So I sold the 789 and got this THX 887 amp from Monoprice to replace it. While I did not do a direct A/B comparison, I can tell you this 887 is to my ears a noticeable step up in sound and tonal balance as it does not grate my ears with sharp treble detail like the 789 did. Much smoother overall than the 789. You might even say softer. I don't personally feel I am missing any detail. I am using the same DAC, the OG Modi Multibit. This pairing is surprisingly great. You're getting soundstage, punchy dynamics, and warmth from the DAC into an excellent measuring, clean/detailed-sounding amp that just gives you the music. Overall, I am pleased with this purchase and can confidently say that all the audio pundits who told you this 887 amp is no different sonically to the 789 were wrong. You get what you pay for and this amp is a great value and an upgrade to the 789, which is also a great value in its own right being at a lower cost than this amp. I would recommend choosing this one over the 789 if your budget can allow. ... show more
Reviewed in the United States on October 10, 2023 by Jack
    • It simply is awesome!
Everything I have thrown at it sounds so much better. Crisp mids and tight bass. Highs are not bad either. Not sure what the THX deal is? If that's what makes it sound so much better, I am not surprised. I was used to DAC/Amp combos and now I know what my expensive headphones were longing for. LCDs, Focals, Beyerdynamics, Sennheisers all sound so much better. I also have the Sony MDR-7506 and Audio Technica ATH-M50x, these anyway sound good with the DAC/Amps. This amp drives all of them pretty good. I also have Topping D30/A30 Pro combo and Ifi Zen DAC v2 and Zen Can and couple of tube amps. They all have their signature sound stage but this amp paired with DacMagic 200M is really really expressive. ... show more
Reviewed in the United States on December 15, 2022 by Jacqueline
    • Absolutely excellent.
I have.... One complaint. I've owned it for a few days and sometimes, very few times, i hear a static sound. HOWEVER, i think this is due to my source rather than the amp. Either way, i wanted to put it out there. I love this thing. Absolutely love it. It made my headphones SING. I have several headphones, including Hifiman Arya, Audeze LCD 2, Audeze Mobius, Shure se846, AKG 701, Drop/Senn 6xx.... Etc Some have small improvements because they are already easy to drive. The Arya, the Audeze, and the 6xx are not easy to drive (well, the Audeze kinda is)...... But they made all three seem like a totally different headphone in a great way. ESPECIALLY the Arya. Plenty of power, incredible sound. If you are debating on getting an amp, like I was, just get this. You will be more than happy. This is my first amp. I used to run the headphones out of an upgraded sound card from Asus and EVGA. I should have done this first. ... show more
Reviewed in the United States on February 16, 2021 by Esteban Camacho
    • Do not buy
Was not any louder than my phone total waste of money and I have bought a lot of products from Monoprice and they have always been great but don't waste your money on this !!!
Reviewed in the United States on March 29, 2024 by Robert
    • End game headphone amp.
This is the least distorted, most transparent, neutral, and powerful sound you can find in a headphone amp It is fully equipped with all the features for connection, balanced or single ended, for all headphones of any impedance and/or sensitivity. It truly is like a straight wire with gain. It has no competition. It is the best. It doesn't cost much. It should last a lifetime. ... show more
Reviewed in the United States on September 29, 2022 by J. Swarts
    • Good not great.
Nice features, good sound...needs some breakin. Out the box it actually sounded warmish, after some time the warmth took a slight back seat, sound real good for the price. However my FiiO M15 sounds better.
Reviewed in the United States on February 4, 2021 by Dynobot
    • Sonically inferior to Drop THX 789 despite measurements
I have the Drop aka Massdrop THX 789 AAA amplifier, and it is my overall favorite amongst a dozen or so headphone amps I own. I bought this because I wanted a second one, and because the Drop unit is unavailable at the time, and because some reviews say this one is better per test measurements. However, often times how a product reproduces a static test signal into a dummy load does not translate as to how a device actually sounds when reproducing a more complex signal such as actual music into a reactive load such as headphones or speakers. This is one of those cases. It's not a bad sounding amp, but it's not a great one either, and the Drop 789 is. At its price it is a decent amp, but the Drop unit is very close in price and a notable step up in perceived fidelity. I also have a Burson Conductor 3x, a Monoprice Cavalli liquid platinum, a Massdrop Cavalli Tube Hybrid, a Massdrop Cavalli Liquid Platinum, a Flex FA-10, a Flux FA-12, a Hifiman EF400, and an iFi iDSD signature, and this amp is my least favorite sonically along with the liquid platinum and the FA 10. It is better than the Topping A90, another amp that measures very well but sounds dull. ... show more
Reviewed in the United States on December 22, 2022 by DiamondPilot
    • Superb value, unimpeachable performance
The vast majority of casual audiophiles will find that this exceeds their needs. The sound quality is excellent. The build quality seems very solid. I'm listening to Bach's chaconne through my Senn HD 660S's right now, and the sound is mesmerizing. I hope Monoprice continues to take the headphone amp market seriously in the future. If they keep making headphone amps like this, with proper marketing and support, they can be major player. ... show more
Reviewed in the United States on May 13, 2022 by Ken H

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