shengya-audio







A-203mk Signature (Signature Edition) Pure Class A combined fully balanced amplifier
A-203mk Signature (Signature Edition) Pure Class A combined fully balanced amplifier
class a balanced amplifier

Frequency response: 10Hz-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: 280mV

High level input sensitivity (LINE 5 gear): 650mV

Signal to noise ratio: 90dB (wideband)

Input impedance: 47KΩ

Dimensions (width x height x depth): 446 x 216 x 503 (mm)

Weight: 32 kg



• The core of the pre-amplifier part is a high-speed DC amplifier module chip developed for many years of experience.

• The volume control adopts the electronic volume control chip CS3310 manufactured by CRYSTAL, the United States, 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;

• Each channel power filter capacitor uses Japanese ELNA audio special electrolysis, with a total capacity of 120,000 microfarads; 32 high-power transistors form a 100W Class A output stage;

• Use German WIMA brand MKP 10 specifications and M-CAP brand audio special film infinite capacitors, five-color ring high-precision metal film resistors, parallel precision regulated power supply;

• The rear-stage signal input circuit is composed of Toshiba field effect transistors for cascode differential amplification, and Toshiba transistors for the second-stage differential voltage amplification and current drive

• The speaker connection terminal uses 8 WBT brand made in Germany, and the wire connected to the terminal uses the American LITON brand pure copper silver-plated speaker wire

• The transformer power input line is changed to the American XLO power line, and the fuse connected to it is also replaced with a German Vincent brand audio fuse

• The DC low-voltage power cord in the machine is also changed to U.S. KIMBER audio dedicated wire; the DC power supply filter capacitor is upgraded to Japanese NICHICON brand MUSE specifications

• The signal channel circuit uses American DALE resistors

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