QLS QA690 Pure Digital HiFi Amplifier Skip DAC Decoder Support DSD 24 192

Product Price: Starting at: $631.75 USD

  • Product Model: Model: MUIA9831704
  • Product Weight: Shipping Weight: 5kg
  • Product Quantity: 3 Units in Stock

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QLS QA690 Pure Digital HiFi Amplifier Skip DAC Decoder Support DSD 24 192
100% Brand New

QLS QA690 pure digital amplifiers achieve true pure digital transmission and amplification. There is no active digital-to-analog conversion or analog amplification in the working circuit, eliminating intermediate devices such as decoders and analog amplifiers.


All items guaranteed 100% BRAND NEW in the original edition Box.


Environmental protection and energy saving, efficient power amplification.
Output power up to 160W x 2 to meet the thrust requirements of most speakers.
Time-aligned, pure digital power amplifiers that support PCM and DSD inputs (DSD is internally converted to PCM and DSP processed).
Continuous tuning QA661, QA360LE, sound style full of calm, competitive atmosphere, both quality and taste, listening at the same time listening.
Insist that the clock is the soul of the sound design concept, using QLS next-generation zero jitter clock and digital processing circuit to bounce the local digital signal asynchronous regeneration, to ensure that the sound image is fine enough, delicate.
Implementing the design concept of power supply as the mother of sound, featured high-power switching power supply, 20,000 UF UK fever main filter capacitor, and a power processing circuit with more than 70% of the whole machine to achieve better sound effects.
A true pure digital amplifier directly processes and amplifies the input digital signal, without analog amplification loop, sound transparent, transient, good dynamic amplitude, small distortion, accurate positioning, and good Deductive recordings emotions.
Good sounds should not be overlooked in any detail. We must carefully adjust the shock absorbers from both the chemical and seismic aspects, and separate the large earthquake source (internal switching power supply) as an independent individual to induce and excite earthquakes so as not to affect other circuits too. The separate excitation of the circuit board and the internal wiring of the circuit board and the screw press force from the shock to the housing are all carefully adjusted and strictly treated.

Digital Input: Fiber coaxial RCA X2, analog input, and optional XMOS digital interface module for USB output Into.
Format support: 16Bit - 24Bit, 32 - 192KHZ PCM signal and DSD64 DoP signal (bit rate, number of bits adaptive)
Input switching mode: panel keys or remote control (digital display input channel, automatically save).
Volume control mode: The panel encoder or remote controller adjusts the volume, the digital tube displays the current volume 0 - 80, the remote controller can fine-tune the left and right sound volume ± 5, automatically save
High-low frequency compensation: Use the remote control for fine compensation of high frequency and low-order harmonics for the speaker's natural frequency response (default is not compensated) •
Input voltage: AC 90V - 130V / 180V - 2S0V (Switching on the left side of the machine).
Load impedance: 2 - 16 ohms.
Output power: 4 ohms: 2 x 160W, 8 ohms: 2 x 100W.
Distortion: <0.02% (-2.5dBFS, 8 ohms).
Dynamic: 101dB (A weighting)
Signal to noise ratio: 101dB (A weighting)
Separation degree: 97dB
Frequency response: 10Hz-20KHz (8 ohms).
Standby power consumption: <13 W.
Machine size: (L) 300mm x (W) 216mm x (H) 100mm; without output connector and knob length.
Machine Net Weight: 5KG

This product was added to our catalog on Wednesday 20 June, 2018.