Questyle CMA 400i Digital Preamp / DAC / Headphone Amplifier

Questyle CMA400i Digital Preamp / DAC / Headphone Amp

Original owner. I purchased this unit brand new several months ago directly from Moon Audio. Very low hours. Absolutely pristine condition. Still requires break-in.

Includes original packing and double box shipping carton, manual and power cord.

Will only ship to lower 48 and to verified PayPal address.

No charge for PayPal. Free Insured Shipping at my asking price.

Local pick-up and inspection is welcome for serious buyers.

Check my feedback and buy with confidence.

Questyle CMA 400i - 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).

Whole Device

· 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）
- 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)