Electronic circuit : 20W Audio Amplifier using LM1875

Specifications

20W Audio Amplifier kit is based on LM1875 IC.   Power supply - 48 VDC Output - 20 W, 4 Ω Very low distortion (THD - 0.015%), good channel separation and ripple rejection IC built-in thermal, short circuit protections Internal output protection diodes Terminal pins for connecting input Power Battery Terminal (PBT) for easy power supply and speaker connection Power-On LED indicator Heatsink for IC Four mounting holes of 3.2 mm each with nut and stud PCB dimensions 48 mm x 60 mm

Schematic

Parts List

PCB