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A soft clipping like the present won't damage a speaker.
Generally, it doesn't make sense to use a lot of output transistors without increasing the drive current
to the output stage, e.g. by utilizing a darlington configuration. Effectively any amplifier circuit above 0.5 or 1 W
uses at least a two cascaded transistors current gain.
that first circuit looks just weird. so many paralleled transistors. should at least have
a resistor in the base or emitter of each i reckon.
whats it sound like ?
Anyway if your talking about junk parts of tvs radios etc.....why did you not just chop up the PCB where the audio amp is. You would have a ready made good audio amp.
Some are easier to chop than others, done this many times in younger times.
Audio amps for free is always good
For its cost of only 3 transistors, my amplifier circuit performs pretty well. A TDA2003 amplifier IC has 16 transistors plus 5 constant current sinks plus many diodes and resistors but has the same output power. Because it has many more parts its distortion is lower than mine.
National Semiconductor has a few excellent audio amplifier ICs. The LM3886 has distortion plus noise of only 0.004% at 1kHz with an output of 68W into 4 ohms or 0.002% with an output of 60W into 8 ohms.
Of course some very high power amplifiers are made with many bipolar transistors.
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