STK3048 Driver STK6153 Classic HiFi Combination Thick Film High-Power Amplifier Finished Board

Circuit Features:

• Classic thick-film combination of STK3048 driving STK6153
• DC center voltage servo, with almost zero center voltage
• Current-type negative feedback
• Two 10000uF 50V original rectifier filter capacitors
• Includes speaker protection circuit with high-current relay
• Volume control circuit with high-performance op-amp feedback, eliminating the effects of resistive potentiometers

 
Parameters:

Power Supply Voltage: AC dual 18V-33V

Output Power: 85W @ 8Ω, 100W @ 4Ω

Maximum Signal Input: 5V

Amplification Factor: 38.2 times

Frequency Response: 25Hz-20kHz / ±2dB

L/R Channel Separation: 40dB

THD N (Total Harmonic Distortion Noise): 0.05%

Output Load: 4-16Ω

Output Channels: 2 channels

Dimensions: 153.72*101.65mm

The entire board is pre-tested. Just add a transformer and a heatsink to start playing sound. For retrofitting old amplifiers/speakers, the effect is much better than typical expensive amplifiers, truly achieving more with less investment.