I wonder how they came up with something like this. The input capacitor to the second stage seems unnecessary. The input unity gain buffering stage seems unnecessary. The 100 uF cap from neg input to ground to reduce DC offset seems unnecessary and is probably a remnant of the days when they used NE5532. I don't understand the meaning of the 22 pF cap, C2 in my schematic. Why use so large resistor values, resulting in unnecessary noise. Why bother using high quality output transistors when using such a low quality opamp as TL082. Why use the 1R resistor on the output. Why, why, whine, whine... All the fancy capacitors ELNA SILMIC II and CERAFINE are probably fake. Hitachi transistors, I wonder... The "metal film" resistors looks like cheap carbon film resistors with blue paint to look like the real stuff. I'm tempted to do a radical mod. I think it would be better to use a single opamp per channel and no capacitors in the audio path. The output stage is OK. The output transistors are B649/D669, but I don't have SPICE models for them.