Here is a new idea, this version uses a couple of slightly more expensive parts, but is vastly simplified. The expensive parts are an electrolytic cap in the output, and a DC blocking cap in the input (1 uF Polypropylene or combination cap Tantalum + MICA is recommended). Needs to be good quality for sound.
The shortcomings of the output electrolytic cap is partly nulled out by C5 / R7, which frequency divides the feedback signal so any distortion from the cap is reduced with the feedback loop. Kind of the opposite we did the last time ...
Note it is a single supply design, so you only need +50V to feed it, not +/- 35V. The output power is 32W in 8 Ohms and 60W in 4 Ohms. Can be tweaked up with higher voltage + higher voltage capacitors. Also the input signal path is very short and referenced directly to gnd, which contributes to good sound.
The shortcomings of the output electrolytic cap is partly nulled out by C5 / R7, which frequency divides the feedback signal so any distortion from the cap is reduced with the feedback loop. Kind of the opposite we did the last time ...
Note it is a single supply design, so you only need +50V to feed it, not +/- 35V. The output power is 32W in 8 Ohms and 60W in 4 Ohms. Can be tweaked up with higher voltage + higher voltage capacitors. Also the input signal path is very short and referenced directly to gnd, which contributes to good sound.
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