DAC with Headphone AMP
Exceeds All Expectation
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 standard.
Build a PC High-end system
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.
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 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.
· 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
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
– Gain: 7.8dB ( 2.47, standard ) / 0.83dB ( 1.1, low )
– 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; 650mW@32Ω (6.35mm headphone jack)
418mW@300Ω; 1200mW@32Ω (balanced headphone jack)
To enhance the reliability of CMA400i, Questyle designed a power-limited circuit used for low impedance, the output power is limited to
410mW @32Ω（6.35mm headphone jack）
430mW @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)