The Questyle Audio CMA800i DAC with Headphone Amplifier

An outstanding all-in-one device should be no-compromise

The Questyle Audio CMA800i headphone amplifier section follows Questyle’s patented "Current Mode Amplification" design used in their flagship headphone amplifier, the Questyle Audio CMA800R, in fact , most of the components used are the same. The ultra low 0.00026% distortion, ultra wide bandwidth, up to 850kHz (+0, -3dB), and Super-current pure Class A architecture enables the Questyle Audio CMA800i’s amplification to be unparalleled among all-in-one  DAC/amplifier models.










Learn more Current Mode Amplification,  click >>


















A World Class DAC section

True DSD

Unlike other DACs that claim DSD support, yet in actuality provide DoP  (DSD over PCM), the Questyle Audio CMA800i accepts the DSD bit-stream directly from your computer, bypassing your computer’s audio processing and digital volume control as well as the Questyle Audio CMA800i’s digital filters, to provide True DSD, the way it was meant to be heard, without requiring expensive difficult to install proprietary connectors, or as is the case with DoP breaking up the bit-stream into 16bit packets and compressing them into a PCM data-stream and then uncompressing them at the other end, buffering them, then reassembling the bit-stream so that it may be sent to the DAC as DSD, all of which requires an extreme amount of processing at both the computer end and the DAC end to perform in real time (which invariably leads to latency, data loss, etc), not to mention a 33% increase in bandwidth requirements for the USB ports and cabling. 

Learn more True DSD, please click CAS192D >>

IIR Digital Filter 

Currently the majority of DACs use FIR (finite impulse response) digital filters, but research and testing has shown that our ears are very sensitive to the pre-ring that FIR digital filters add to the impulse wave, making the music sound incoherent and unnatural. The Questyle Audio CMA800i offers the more advanced IIR digital filter, which completely eliminates the pre-ring from the impulse wave producing a more natural sound.

Learn more about FIR and IIR digital filter, please click CAS192D>>

A Sepatate Pre-Amplifier Section

The Pre-Amplifier output is another unique feature of the Questyle Audio CMA800i. Many manufacturers, when designing an all-in-one model, use the headphone amplifier circuit loop to support the pre-amplifier output to reduce costs. To achieve the best possible sound performance, the Questyle Audio CMA800i is designed with a totally independent pre-amplifier, even the power supply supporting the pre-amplifier circuit is independently located.

In keeping with Questyle Audio’s no-compromise approach. and to make usage more convenient, an analog volume control circuit is employed, using an ALPS27 motor controlled potentiometer for operation via remote control.


Match the Questyle Audio CMA800i with Active Speaker

The Questyle Audio CMA800i is an excellent choice to drive active speakers. Questyle has a strategy cooperation partnership with ADAM Professional Audio, a perfect match for the Questyle Audio CMA800i.

Hi-End Components Throughout

Superior sound performance requires the use of Hi-end components. Questyle uses only the very best in the Questyle Audio CMA800i, each component undergoing an extensive testing and selection process, with many being custom made and purpose built.


10mm Thick Aluminum Cover and Bottom Chassis

The Questyle Audio CMA800i aluminum chassis is produced by Foxconn using precise CNC tooling machines. The upper cover and bottom chassis “mutual bit” structure design, provides the Questyle Audio CMA800i with stable heat, excellent control of sympathetic vibration and excellent shielding from RFI/EMI radiation. 















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Quality Control

Each product is burned in for 72 hours before shipping and every product has its own serial number and test report. The engineers prepare two copies of the test report, one report is put in the box for the customer and another report is kept in a safety deposit box at Questyle. If there are any questions, about any product, at anytime, Questyle is able to find the report, for that unit, to aid in solving any issues. For distributors, Questyle can provide a professional technical guide. 



Specification

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Headphone Amp section (External Format)DAC and Pre-Amp section
  • Gain:  11.8dB (3.9times)

  • Max Output Power(Po):180mW(7.5Vrms)@300Ω;1W@32Ω

  • THD+N:

    0.00026%@1kHz,Po=100mW,300Ω

    0.00050%@1kHz,Po=50mW,32Ω

  • SNR:  118 dB,

  • Frequency:  DC-200kHz(+0,-0.5 dB);DC-850kHz(+0,-3 dB)

  • Sensitivity:  2.2Vrms

  • Input:  Internal DAC output, or External RCA input,switchable

  • Output:  Dual 6.35mm Standard Stereo Jacks

  • Input:SPDIF input and output, USB Type B input

  • Signal:

    SPDIF input and output: 

    Standard PCM 44.1-192k/16-24bit 

  • USB:PCM 44.1-192k/16-24bit and 

    DSD Source Code following standard SACD format

  • PC OS to match USB input:Win XP,Vista,Win7,Win8 and MAC OS

  • Digital Filter:

    PCM Mode:Switchable IIR(MP) and FIR (LP)

    True DSD Mode: No filter

  • USB supported Kernal stream:

    WASAPI,ASIO,KS

  • Analog Output:Balanced (XLR) and unbalanced (RCA)

  • Max output amplitude:

    XLR:8.6Vrms;RCA:4.3Vrms

  • THD+N:< 0.005% for both XLR and RCA

  • SNR:>107dB for both XLR and RCA


    Whole device

  • Voltage:

    100-120V or 220-230V switchable

  • Power Consuming:13W

  • Dimension:330*300*55 mm