Monoprice
Monoprice Monolith THX 887
Best desktop amplifier for audiophiles seeking reference-grade sound on a budget.
Experience exceptional audio fidelity with the Monoprice Monolith THX 887, a desktop headphone amplifier designed for critical listening. This amplifier leverages advanced THX technology, offering near-reference quality sound. It serves as a direct clone of the highly acclaimed Drop THX AAA 789, providing outstanding performance and robust build quality. Its design also considers stacking compatibility, making it a superb value for serious listening setups and discerning users seeking superior sound.
$399.00
Owner Satisfaction
4.8
/ 5
Category Rank
16
/ 733
#16 in Headphone Amplifiers
Price vs Category Average
-71%
Below average
Model Number
887
/ THX
Who it's for
- Audiophiles seeking pristine, transparent sound reproduction
- Owners of power-hungry, high-impedance planar magnetic headphones
- Budget-conscious listeners wanting high-end performance for less
Who should skip it
- Design-focused users wanting a sleek, clutter-free desktop setup
- Beginners looking for an all-in-one DAC and amplifier solution
- Users relying on 4.4mm balanced cables for their headphones
Performance breakdown
Audio Transparency
THX technology delivers an incredibly clean, neutral sound profile for critical listening.
Power Output
Effortlessly drives even the most demanding high-impedance audiophile headphones with ease.
Build Integrity
Heavy-duty chassis construction provides a reassuringly solid and durable desktop presence.
Signal Purity
Near-zero distortion ensures your music remains exactly as the artist intended.
Connectivity Versatility
Limited input options may require additional adapters for complex multi-source setups.
Stacking Ergonomics
Compact footprint integrates seamlessly with standard DACs for a clean desk.
Key Specs
Model Number
THX 887
Category
Headphone Amplifier
Form Factor
Desktop
Amplifier Technology
Solid State
Input Interface Type
RCA
Output Interface Type
6.35mm Jack
Display Type
None
Power Source Type
AC Powered
Features
- High-performance THX amplification technology
- Exceptional audio fidelity for critical listening
- High-value alternative to premium amplifiers
- Designed for excellent sound quality
- Robust build quality
- Clone of the THX AAA 789 amplifier
- Potential for superior stacking compatibility
What customers say
The Monolith THX 887 earns high praise for delivering exceptional value and reference grade audio performance. Users consistently highlight the amplifier's incredibly clean and transparent sound signature, thanks to its THX AAA technology, which ensures virtually no audible distortion. A major recurring theme is its immense power reserves, effortlessly driving demanding planar magnetic and high impedance headphones while maintaining excellent control and dynamics. The build quality is robust, offering reliable connectivity. Many audiophiles feel the 887 performs far above its price point, making it a highly recommended component for those seeking uncolored, powerful amplification without the typical high cost.
Know before you buy
The Monolith THX 887 is essentially a direct clone of the Drop THX AAA 789. Both units utilize the same THX Achromatic Audio Amplifier technology, meaning you can expect nearly identical sonic performance and technical specifications from both devices.
Because of its high-performance solid-state design, this amplifier is capable of driving a wide range of headphones, from sensitive in-ear monitors to demanding planar magnetic models. Its neutral, transparent sound profile makes it an excellent choice for critical listening where accuracy is the priority.
Yes, the chassis is specifically designed with stacking in mind. It is frequently paired with units like the RME ADI-2 DAC, allowing you to create a compact, organized desktop stack without sacrificing performance.
No, the Monolith THX 887 is a dedicated headphone amplifier only. You will need to connect it to an external DAC via its RCA inputs to process your digital audio signals.
The front panel features a standard 6.35mm (1/4-inch) jack for your headphones. Ensure your headphone cable is compatible with this connection or that you have the appropriate adapter on hand.
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