Yeah- what Grumpy said...
Quote:
Originally Posted by
grumpy
"...but this voltage needs to be higher than any expected signal peak voltage."
I challenge this repeated assumption. I suggest the bias voltage only needs to be sufficient to mitigate low level distortions, where they are likely to be audible... something like a class A/B amp
which does not require to be biased completely into 100% class A operation in order for there to be benefit. One may certainly debate at what point further bias voltage increase brings diminishing returns for a particular speaker system. I expect there are opinions throughout the possible range of values.
Have fun. Don't hurt yourself.
Grumpy, you are 100% correct: charge-coupled capacitors reduce the crossover circuit distortion AND push the behavior anomalies of the capacitors to a level equating to a peak of 2 1/2 to 20 watts output level (biased at 9 volts), instead of in the miliwatt or microwatt level. These distortions become so miniscule relative to the signal level (and sound pressure level into the 100dB-plus range for cone drivers and to 110-120dB level for compression drivers) that the distortion is undetectable compared to the relatively large distortion at milliwatt output levels.
No scam, just simple facts.
*Your mileage may vary, depending on crossover capacitors employed, bias voltage applied, transducers used, type and condition of wiring, amplifier quality, signal spurce, and other factors... :drive: