Skema Amplifier + Band Pass FullRange 80hz 5,5khz

CORRECTION: The Re value for the 100 ohm Buffer TR was incorrectly stated as 100 Kohm. I apologize, but I'm correcting this. Thank you to Akun ung for notifying me... (in the video comments). The mono audio amplifier schematic features a full-range 80Hz-5.5KHz bandpass using op-amps in both the bandpass and differential sections. Detailed information can be found in the video narrative, and the schematic layout can be found on my Facebook page... etc.