Harman kardon AVR 2550 - Schematic - full

Used ICs and Transistors: TC9215AF, NJM2068M, M45556A, LC755725E, MB90F-476APFQ

Power output transistors: 2SD2390/ 2SB1568 pair

Audio Section

Stereo Mode: Continuous Average Power (FTC)
50 Watts per channel, 20Hz–20kHz, @ < 0.07% THD, both channels driven into 8 ohms
Five-Channel Surround Modes
Power Per Individual Channel Front L&R channels
40 Watts per channel, @ < 0.07% THD, 20Hz–20kHz into 8 ohms
Center channel:
40 Watts, @ < 0.07% THD, 20Hz–20kHz into 8 ohms Surround channels
40 Watts per channel, @ < 0.07% THD, 20Hz–20kHz into 8 ohms
Input Sensitivity/Impedance
Linear (High Level) 200mV/47kohms
Signal-to-Noise Ratio (IHF-A) 95dB
Surround System Adjacent Channel Separation
Analog Decoding 40dB
 (Pro Logic, etc.)
Dolby Digital (AC-3) 55dB
DTS 55dB
Frequency Response
@ 1W (+0dB, –3dB) 10Hz–100kHz
High Instantaneous Current Capability (HCC) ±25 Amps
Transient Inter-modulation
Distortion (TIM) Unmeasurable
Rise Time 16 µsec
Slew Rate 40V/µsec

Schematic [Click on the schematics to zoom in]