shengya-audio







A-211 Advanced combined pure type A gallstone mixture
A-211 Advanced combined pure type A gallstone mixture
class a balanced amplifier

Frequency response: 20Hz-20kHz ± 0.5dB

Rated output power: 100W + 100W(8Ω) 200W + 200W(4Ω)

Class A output power: 100W + 100W (8Ω)

Harmonic distortion: 0.1% (1kHz 1W)

Low level input sensitivity: 150mV

High level input sensitivity (LINE 5 gear): 400mV

Signal to noise ratio: 90dB (wideband)

Input impedance: 47KΩ

Dimensions (width x height x depth): 430 x 206 x 445 (mm)

Weight: 27 kg



• The pre-amplifier part adopts the imported 12AX7/ECC83 electron tube common cathode amplifier circuit, and the imported ECC82 electron tube serves as the SRPP buffer amplifier;

• Vacuum tube and transistor hybrid precision high-voltage stabilized power supply, with extremely high voltage stability, extremely low AC ripple coefficient, and more "guts" sound performance; 

• The power amplifier part is made up of Japanese Toshiba high-power transistors to form a 0dB current amplifier circuit;

• The electronic tube circuit cross-connect and de-cross-connect capacitors are German WIMA brand MKP series high-end audio special capacitors;

• The filter capacitor used in the transistor power amplifier power supply is the Japanese ELNA brand FORAUDIO series 10000uf/50v specification;

• The volume control adopts the electronic volume control chip CS3310 made by American Crystal Company, so that the error level between channels is controlled within 0.5dB;

• A toroidal high-power transformer with a shielding box is placed in the machine to effectively reduce the vibration and noise interference generated by the transformer during operation;

• Two channels independently use special audio filter capacitors and rectifiers, with a total capacity of up to 120,000 microfarads;

• 32 high-power transistors form 100W 8Ω pure Class A output power per channel;

• Another function of this machine is that it can be used as an independent post power amplifier, and the 5th signal input terminal can be used to connect to other pre-stage power amplifiers.

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