shengya-audio







A-238 Class A Balanced Hybrid Amplifier
A-238 Class A Balanced Hybrid Amplifier
Tube class a balanced amplifier

Output power: 100W+100W (8Ω)/200W+200W (4Ω)

Class A output power: 100W+100W (8Ω)

Frequency response: 20Hz-20KHz ± 0.5dB

Low level input sensitivity: 150mV

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

Harmonic distortion: ≤0.1% (1kHz 1W)

Signal to noise ratio: >90dB (wideband)

Input positive resistance: 47kΩ

Dimensions: 427×212×482mm

Weight: 30kg



• The pre-amplification part adopts the ECC803 tube common-cathode amplifier circuit, and the ECC802 tube serves as the SRPP driving amplifier, which results in beautiful sound and great dynamic performance;

• It adopts a hybrid precision high-voltage stabilized power supply. The voltage stability is extremely high, while the AC ripple coefficient is extremely low;

• The power amplifier part is made up of Toshiba high-power transistors to form a 0dB current amplifier circuit. The sound is warm and powerful. It can easily drive a variety of advanced brand speakers;

• The tube circuit cross-connect capacitors are German MCap brand oil-immersed capacitors and 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, which controls the error level between two channels within 0.5dB;

• The toroidal high-power transformer is filled with epoxy resin with a shielding box, which effectively reduces the vibration and noise interference;

• The AC power sockets are Japanese Furutech gold-plated, and the built-in fuse is Swiss Schurter brand;

• Two channels independently use special audio filter capacitors and rectifiers, with a total capacity of up to 120,000 microfarads and 32 high-power transistors to form 100W (8Ω) pure Class A output power per channel;

• the speaker terminal uses German WBT brand products, while the balanced signal input terminal uses Swiss Nutrick brand products;

• Another function of A-238II is as an independent power amplifier. You can use the LINE5 high-level signal input terminal to connect to other pre-amplifier;

• A-238 introduces the CPU full-function control and data information screen display mode; The full-function infrared remote control system is specially set up for users.

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