Monoprice Monolith THX AAA 788 Review: Ranked #25 of 53

Last updated: October 13, 2026

The Monoprice Monolith THX AAA 788 ranks #25 out of 53 total DAC and Headphone Amp Combos for sound quality. See all Headphone Amps and DACs rankings for every top pick.

Brand: Monoprice

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Monoprice Monolith THX AAA 788 - ranked #25 of 53 DAC and Headphone Amp Combos · Editor's rating 4.4/5

#25 Monoprice Monolith THX AAA 788 Discontinued eBay

Pros: Audio Science Review measured a SINAD of 107 dB, so noise and distortion stay well below audibility in normal listening. A rated 3,120 mW into 32 ohms is enough for nearly any headphone, including hard to drive planars, with 580 mW into 300 ohms for high impedance models. It offers balanced outputs and USB, optical, coaxial, AES, XLR, RCA inputs.

Cons: Discontinued, so it is mainly found used.

Released2018 (8 years ago)
Balanced OutputYes
DAC Chip2 x AK4493
Device TypeDAC and headphone amp
Dimensions8.7” x 2” x 7.8” (221 x 51 x 198 mm)
Headphone Outputs6.35 mm, 4-pin XLR
InputsUSB, optical, coaxial, AES, XLR, RCA
Output Power (300 ohms)580 mW
Output Power (32 ohms)3,120 mW
OutputsRCA
SINAD107 dB (measured by Audio Science Review)
Volume ControlDigital

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