HARMAN KARDON AVI250 is an audio amplifier made by HARMAN at 90s which it has a THX feature and Surround system 5.1 for make best perform of audio.
Inside the amplifier has 6 unit amplifier that it can be produce 100 Watts of audio. But in this post i just took one of six for review.
SCHEMATIC DIAGRAM
Below is an edited schematic of the original one.
The Power Amplifier needs symmetrical 55VDC.
