Questyle CMA800i Headphone Amp & DAC
Questyle CMA800i Headphone Amp & DAC
Balanced Headphone Amp and DAC with true DSD capability
An outstanding, no compromise, all-in-one device
Designing a DAC, headphone amp and pre-amp in one box without compromising the performance of any of these components is not easy: it requires excellent circuit design skills and sound quality control plus a good deal of tweaking and fine-tuning over time to balance the performance of each component. The CMA800i achieves a no-compromise solution.
The Questyle Audio CMA600i 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.
With ultra low 0.00026% distortion, ultra wide bandwidth up to 850kHz (+0, -3dB), and Super-current pure Class A architecture, the Questyle Audio CMA800i’s amplification is unparalleled among all-in-one DAC/amplifiers.
World-Class DAC with True DSD Processing
CMA800i is designed with Questyle patented True DSD technology and Wolfson WM8741 DAC chip. Unlike other DACs that claim DSD support when in reality providing DoP (DSD over PCM), the Questyle CMA800i accepts the DSD bit-stream directly, bypassing your computer's audio processing and digital volume control, as well as the CMA600i's digital filters, to provide True DSD, with no PCM conversion.the way it was meant to be heard.
The Questyle Audio CMA800i achieves this without requiring expensive, difficult to install, proprietary connectors. Neither does it require, as is the case with DoP, breaking up the bit-stream into 16bit packets, compressing them into a PCM data-stream then uncompressing and buffering them at the other end, and reassembling the bit-stream so that it may be sent to the DAC as DSD. A huge amount of processing is required at both ends in order to perform this in real-time - which invariably leads to latency, data loss, etc, and a 33% increase in bandwidth requirements for the USB ports and cabling.
Separate pre-amplifier section
The Pre-Amplifier output is another shared feature of the Questyle Audio CMA800i and CMA600i. 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 CMA600i is designed with a totally independent pre-amplifier.
10mm Thick Aluminium cover and bottom chassis
The Questyle Audio CMA800i’s aluminium chassis is produced by Foxconn, using precise CNC tooling machines. The specially tooled "mutual-bit" structure makes the chassis strong and stable. Each side of CMA800i has balanced weight since its internal weight is evenly planned. CMA800i's feet are made of pure aluminum, helping to avoid resonance. Even every screw is precisely CNC-tooled into "CD texture", giving CMA800i another unique feature.
Finish Space Gray
Material CNC machining aluminum
Working State pure Class A
Voltage 100-120V or 220-230V switchable
Power Consumption 18W
HEADPHONE AMP SECTION
Gain 13.4dB (4.7times)
Max Output Power
220mW@300Ω; 950mW @32Ω(normal headphone jack)
630mW @300Ω; 1900mW @32Ω (balanced headphone jack)
0.00057%@1kHz, Po=100mW, 300Ω
0.0034%@1kHz, Po=50mW, 32Ω
SNR 113 dB, non-weighting
DC-100kHz(+0, -0.7 dB); DC-600kHz(+0, -3dB)
Internal DAC output, or external RCA x1pr , switchable
Dual 6.35mm standard stereo headphone jacks and a 4-PIN balanced headphone jack
DAC AND PRE-AMP OUTPUT SECTION
SPDIF input and output: PCM 44.1-192K/16-24Bit standard USB: 44.1K-384K/16-32Bit PCM and DSD native, DSD64, DSD128, DSD256
PC OS Requirements
Win XP,Vista,Win7,Win8,Win10 and Mac OS
Digital Input & Output
SPDIF input and output, Optical input, USB type B input
Audio Stream supported by USB：WASAPI, ASIO, KS
PCM Mode: IIR (MP) and FIR (LP) switchable; DSD mode: no filter
Balanced XLR x1pr, single ended RCA x1pr
Max Analog Output Amplitude
XLR: 8.6 Vrms; RCA: 4.3 Vrms
RCA: < 0.00082%; XLR: < 0.00064%
RCA>105dB; XLR: >121dB (non-weighting)
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