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Not

If this were really a problem we would be hearing about a lot more damaged woofers in the world!

Getting rid of all coupling caps in the signal path is asking for trouble though. The first problem is that as soon as there is a direct coupled path, the circuit now has a lower timing constant than its power supply. This opens the door to intermodulations. Of course this can be overcome by a much larger supply, but it can also be overcome by a small coupling cap at the input of the circuit.

I prefer to have the coupling cap in the middle of the amp somewhere, so that intermodulations in the amplifier itself do not result in modulations to the supply. This really helps keep IMD down...

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