Questyle Audio CMA400i DAC Headphone Amplifier


Preorders Only, Arrives October 2017

NEW Questyle Audio CMA400i DAC with Headphone Amp exceeds all expectation!

Includes all the state-of-the-art technology of Questyle Golden Reference System.

Full-balnced Amplification featuring four groups of pure Class A Current Mode amplification circuits.

Supports 4pin balanced XLR output, 2.5mm balanced headphone jack and 6.35mm headphone jack.

Questyle CMA400i Review - June 2017 by Headphone Guru


The CMA400i is visually impressive and mysterious for its black and sandblasted chassis with amber light LED indicators.

CMA400i can be placed straight with a specially designed stand, which is not only space saving but eye-catching for its statue-like structure under light.

Lasered dots on the volume scale show the accuracy and specialty of operation.

The "Function" switch on the front panel is to switch between "Headphone Amplifier" and "Pre-amplifier". A LED indicator will show you whether the working "Function" is "AMP" or "Pre-amp" to focus on current function.


CMA400i can drive headphones in full-balanced mode as it features four groups of pure Class A Current Mode amplification circuits, and supports a 4PIN balanced XLR output, a 2.5mm balanced headphone jack and a 6.35mm standard headphone jack.

In addition, the new design of Gain Control switch at the bottom of the chassis benefits CMA400i with perfect driving power for different headphones.

CMA400i is designed with Questyle patented True DSD technology and AKM AK4490 DAC chip. It processes DSD signals without any PCM converting and provides True DSD.

Built with four groups of pure Class A Current Mode amplifiers and all discrete circuit, which achieves the ultra-low distortion level of 0.0006% and ultra-wide bandwidth up to DC-600kHz (+0, -3dB).

The impressive technical performance together with warm and powerful sound makes CMA400i comparable with a high-end headphone amplifier.

High-end components ensures ultra-high fidelity sound. Power supply plays a vital role. Customized Noratel toroidal transformer. Over 10 groups independent power supply system.


The chassis is made of aircraft-grade Aluminum 6063 and manufactured by Foxconn, black and sandblasted chassis, which ensures the CMA400i remains at 55 ℃ even works in pure Class A status for a long time. Exquisite chassis edge, with elegant edge line, clock calibration volume knob, amber light feeling of LED indicators, all details telling Questyle strict requirement on manufacturing.

Each panel passed fine machining by CNC device, tolerance under ±0.02mm, volume knob tolerance under ±0.005mm, processed with top level CNC standard.


CMA400i has a great capability for signal processing, supporting Windows XP, Vista, 7, 8 & 10, and Mac OS.

When connecting to a computer, it is only responsible for sending data. So everything related to sound quality will be guaranteed by CMA400i, no matter if it is a song, a film or a game.

The performance of a traditional Hi-Fi system can be much improved by CMA400i because of its completely separate DAC with optical and coaxial interfaces. Another distinctive feature of CMA400i is switching between "Headphone Amplifier" and "Pre-amplifier" by the "Function" switch on the front panel. In DAC mode, CMA400i supports RCA and XLR pre-amp outputs which can be selected by the ADJ/FIX switch on the rear panel.

Questyle CMA400i Headphone Amp DAC Review - January 2017 by Inner Fidelity

Questyle CMA400i Headphone Amp DAC Review - January 2017 by Stereophile

Questyle CMA400i Headphone Amp DAC Review - January 2017 by AVHUB

More Information
Drew's Recommendations Yes

Product Reviews

Finish:   Black 
Chassis Materials:   special CNC tooled Aluminum 
Dimension:    279mm[W] x 189mm[D] x 55mm[H]
Weight:    84.65oz (2.4kg) 
Working Status:    Pure Class A
Voltage:   100-120V or 220-230V, switchable
Power consumption:    17W
Pre-amplifier and DAC Section
THD+N:    RCA: <0.0009%; XLR: <0.0009% 
SNR:    RCA: >110dB; XLR: >113bD (non-weighting)
USB Type B Input:    44.1K-384K / 16-32Bit PCM and DSD native, DSD64 / 128 / 256
Digital Interface:    SPDIF input and ouput, OPT input; Support 44.1K-192K / 24Bit PCM 
Headphone Amplifier Section
Output Interface: 

 A 6.35mm standard headphone jack

 A 4-PIN full-balanced headphone jack

 A 2.5mm full-balanced headphone jack 

Max Output Power (Po):  

 106mW @300Ω;

 980mW @32Ω (normal headphone jack)

 418mW @300Ω;

 3920mW @32Ω (balanced headphone jack) 


 0.0013% @ 1kHz, Po=100mW, 300Ω

 0.0016% @ 1kHz, Po=50mW, 32Ω

Frequency Response:  

 DC-100kHz (+0, -0.7dB);

 DC-600kHz (+0, -3dB)

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