Guru
Joined: 11/02/2018
Location: AustraliaPosts: 3376
| Posted: 01:11am 30 Nov 2022 |
"Volhout's filter makes is of no consequence to me. I expect that what you hear when using the switching transistor is the audio harmonics in the signal filtered out by the frequency response of the device and your ears."
That is also my experience.
This morning I have tested this Class-D push-pull amp. It gives more volume than a single transistor.
The output filter makes no audible difference, though the scope shows it greatly reduces the 44kHz at the speaker.
Transistor types, resistor and capacitor values are not critical.
It just increases the amplitude of the 44kHz modulated square wave.
These days most cheap audio stuff uses class-D.
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