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Exceed all expectations

DAC with Headphone amplifier


CMA400i, inheriting the state-of-the-art technology found in the, Questyle Golden Reference System, visually impressive and mysterious, in its black and sandblasted chassis, and the amber light LED indicators.

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

Lasered dots of volume scale, which is the DNA of Questyle product family, show the accuracy 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”, namely, to focus on current function.


Full-balanced Amplification

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.

True DSD Processor

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.

Current Mode Amplifier

CMA400i is 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 ensure ultra-high fidelity sound. Power supply plays a vital role.

Customised Noratel toroidal transformer. Over 10 groups of independent power supplies. Questyle care about every single detail.


CMA400i’s chassis is made of aircraft-grade Aluminum 6063 and manufactured by Foxconn, black and sandblasted chassis, which ensures that CMA400i remains at 55℃ in pure Class A status for long periods.

Exquisite chassis edge, with elegant edge line, clock calibration volume knob, amber light feeling of LED indicators, all details show Questyle’s strict requirement on manufacturing.

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


Build a PC Hi-end system

CMA400i has a great capability for signal processing, supporting Win XP, Vista, Win7, Win8, WIN10 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, film or a game.

Match CMA400i with

Traditional Digital Sources and Active Speakers

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.


Each CMA400i is tested by QC engineers from Foxcon, before shipping and a testing report filled.

Every testing report is unique and written in two copies, one is put in the product packing box for the customer, and another is kept in a safety box at Questyle to aid in following up and maintaining.

Specifications CMA400i

Finish: Black

  •  Chassis Materials:  special CNC tooled Aluminum
  •  Dimension:279mm[W]×189mm[D]×55mm[H]
  •  Weight:84.65oz (2.4kg)

Pre-amplifier and DAC Section

– THD+N: RCA:< 0.0009%;  XLR:< 0.0009%

– SNR: RCA: >110dB;  XLR: >113dB (non-weighting)

– USB Type B Input:

44.1K-384K/16-32Bit PCM and DSD native, DSD64 / 128 / 256

– Digital Interface:

SPDIF input and output, OPT input;

Support 44.1K-192K / 24Bit PCM

  •  Working Status: Pure Class A
  •  Voltage : 100-120V or 220-230V, switchable
  •  Power Consumption:17W

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)

– THD+N:

0.0013%@1kHz, Po=100mW, 300Ω

0.0016%@1kHz, Po=50mW, 32Ω

– Frequency Response:

DC-100kHz (+0, -0.7dB);  DC-600kHz (+0, -3dB)



Buy today

Buy the Questyle CMA400i today…

We generally carry this item in stock and you can buy it today via our online shop at the following link:

Buy the Questyle CMA400i at www.audiovenue-shop.co.uk