CMA400i, inheriting the state-of-the-art technology of Questyle Golden
Reference System, is visually impressive and mysterious for its black
and sandblasted chassis, and the amber light of 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 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", namely, to focus on
CMA400i can drive headphones in full-balanced mode as it features four
groups of pure Class A Current Mode amplification circuits, and supports
a 4-PIN 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.
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
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. 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℃ even works in pure Class A status for 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, tolerence under ±0.02mm,
volume knob tolerence under ±0.005mm, processed with top level CNC
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 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.
Each CMA400i is
tested by QC engineers from Foxconn with Audio Precision AP2722 before
shipping and has its testing report filled.
Every testing report is unique and is kept in a safety box at Questyle to aid in following up and maintaining.
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
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)
· Finish: Black
· Chassis Materials: special CNC tooled Aluminum
· Dimension: 279mm[W]×189mm[D]×55mm[H]
· Weight: 84.65oz (2.4kg)
· Working Status: Pure Class A
· Voltage: 100-120V or 220-230V, switchable
· Power Consumption: 17W