[sdiy] Harmonic bandwidth

[Nicholas Gregorich]

Tim Daugard wrote:
>> I don't know what happens when you drive a speaker with a square wave
>> with lots of high order harmonics. I imagine it must filter the
>> harmonics that are excessively higher than the frequency response of the
> 
> The speaker coil melts - I did this with a speaker and an amplifier with a reasonable
> level of power. AFTER I did that, I added an output filter to my amplifier driver module
> to ensure I didn't destroy any more speakers with harmonics or signals I couldn't hear.
> 

That's pretty interesting, doesn't the coil also melt when you run DC
through it?

Actually I thought class-D amp people were using speakers as filters for
the whole switching amplifier thing. Hmmmm.

Nick.