shengya-audio







A-221 Advanced combined pure type A gallstone mixture
A-221 Advanced combined pure type A gallstone mixture
class a balanced amplifier

Frequency response: 20Hz-20kHz ± 0.5dB

Rated output power: 250W + 250W (8Ω)

Class A output power: 20W + 20W (8Ω)

Harmonic distortion: 0.1% (1kHz 1W)

Low level input sensitivity: 180mV

High level input sensitivity (LINE 5 gear): 520mV

Signal to noise ratio: 90dB (wideband)

Input impedance: 47kΩ

Dimensions (W x H x D ): 430 x 206 x 445 (mm)

Weight: 26.5 kg



• The core of the pre-amplifier part is a high-speed DC amplifier module chip developed for many years of experience, which is prominent in the wide frequency response and extremely low distortion

• Advanced combined type A and B gallstone hybrid fully balanced amplifier fully balanced transmission amplifier circuit;

• The voltage amplifier input stage uses 12AX7 tubes, and the second stage drive amplifier uses 12AU7 tubes;

• Power amplifier adopts 16 Toshiba high-power transistors, 250W power output stage, 20W Class A output;

• 500w high-power toroidal transformer, 80,000 microfarad audio special filter capacitor, bass performance is deep and powerful, and dynamic

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