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Questyle Audio CMA800R DAC Headphone Amplifier

questyle_cma800r

Questyle Audio

Moon Audio

Hot New Products,Questyle Audio ,

$1,999.00

NEW Questyle Audio CMA800R Current Mode Headphone Amplifier is a dedicated quest for perfect sound.



"I heard details previously buried deep in the track. The sound was dynamic, ethereal, detailed and precise with no unpleasant artifacts of any kind. Everything you want music to be was there."



- Howard Gladstone


Piltron President

Description

Details

Hearing your music for the first time

The "Current Mode Amplification" technology, developed and designed by Questyle Audio CEO and founder Wang Fengshuo, provides the airiness and musicality of a tube amp while maintaining the speed and accuracy of transistors. This technology is subject to a PCT patent. 

In current mode amplification, the signal is amplified by modulating current instead of Voltage. It is widely applied in the high speed communication industry and the video processing industry. However, it is Questyle Audio's patented technology as applied to headphone amplifiers. 

The goals of all high performance amplifiers is low distortion and wide bandwidth. Only with ultra wide bandwidth and high speed processing can an amplifier wonderfully process sudden pulse wave signals, and achieve realistic playback of music signal with speed and transparency. 

In order to achieve this, Questyle Audio abandoned the traditional voltage mode format and developed "Current Mode Amplification." When the component is working in Current Mode, the amplifier Slew Rate (SR) achieves a linear increase as input signal amplitude increases, in direct proportion to the input signal amplitude. 

When receiving a high amplitude signal, a "Current Mode" amplifier's SR is much faster than traditional Voltage mode devices, totally eliminating TIMD and ensuring a high amplitude signal with an extremely wide linear bandwidth and an almost distortion free realistic playback. 

 

Work Principle

Questyle Audio's Current Mode Amplifier employs all discrete componentry in a Class A configuration in order to maximize accuracy, current capability, and consistency. To insure maximum compatibility with source units and speakers (headphones), Input and Output both work in voltage mode.

This diagram shows the input signal travling to the VCCS first; voltage mode is converted to current mode here. It then goes to Ai for amplification (in current mode). Next, it goes to I/V converter to become voltage mode again, and then is output to OPT stage to drive headphones.

Questyle Audio Work Principle Diagram CMA800R

Chassis

The Questyle Audio CMA800R has a 10mm thick aluminum chassis produced by Foxconn using precise CNC tooling machines.

The upper cover and bottom chassis "mutual bit" structural design, provides the Questyle Audio CMA800R with stable heat, excellent control of sympathetic vibration and excellent shielding from RFI/EMI radiation.

Mono Full Balanced Function

The Questyle Audio CMA800R is the first headphone amplifier to offer Mono Full Balanced output. To create a proper balanced output, a stereo amp is required for each channel. Rather than compromise by using a transformer or resistors, Questyle takes advantage of this by allowing you to switch two Questyle Audio CMA800Rs into "Mono" mode, putting each one into a "Mono Full Balanced" configuration, effectively bridging them in a "Dual Mono" set up.

The output power is four times that of a single Questyle Audio CMA800R, separately driving the left and right channels, with an ultra-low 0.00038% distortion, and unparalleled channel separation, able to drive high impedance and low sensitivity headphones deeply, improving resolution and dynamics. In this Dual Mono configuration, each channel's power supply and amplification are independent, providing first class driving power, which is especially outstanding in driving difficult to drive headphones or headphones which lack in sound field or separation.

Q&A

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Features

Additional Info

Gain:   15.5dB
Max Output Power: 

 180mW (7.5Vrms) @300Ω, standard Stereo Mode

 710mW (15Vrms) @300Ω, Mono Mode

SNR: 

 114 dB, standard Stereo Mode

 118 dB, Mono Mode

THD+N: 

 0.00038% @1kHz, 300Ω standard Stereo Mode

 0.00026% @1kHz, 300Ω Mono Mode

Frequency Response:   DC-200kHz (+0, 0.3 dB); DC-650kHz (+0, -3 dB)
Sensitivity:   1.2Vrms
Impedance:   47KΩ
Input:   XLR stereo, RCA Stereo, and XLR Mono Full Balance input 
Output:  

 Dual 6.35mm Stereo headphone Jacks,

 a XLR Mono Full Balance output,

 A pair RCA Pre-amp output 

Work Status:   

 Pure Class A 

Voltage:  

 100-120Vor 220-230V, Internal switchable 

Power Consumption:    13W 
Dimension:    330 x 300 x 55 mm

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