for typical horn systems, which capacitors charge coupled have given you the best overall sound? - which capacitors gave the best sound for the least money? Which bias voltages worked the best? Was it helpful in some cases to use multiple 9 volt batteries in series? Did any electrolytics outperform film caps?
I'm wiring up an old Klipsch B network into a CC -"A" - don't have any battery holders yet - ESR looks reasonable on these caps -
I'm wiring up an old Klipsch B network into a CC -"A" - don't have any battery holders yet - ESR looks reasonable on these caps -
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how much bias voltage for charge coupled networks?
how might it matter going from 9vdc to 18 ->27 ? does the effect have much to do with speaker sensitivity and playback levels? which inexpensive caps sound the best overall charge-coupled from your experiments ?
how might it matter going from 9vdc to 18 ->27 ? does the effect have much to do with speaker sensitivity and playback levels? which inexpensive caps sound the best overall charge-coupled from your experiments ?
He's talking about putting a DC bias on crossover caps. Some of the schematics I have seen use 4 caps in a bridge with a battery across the middle. Theoretically could be useful for really bad caps, but decent caps are probably cheaper than the batteries...and the multiple bad caps.
Basically, it seems like the kind of "mysterious magic" that novices fall for.
Basically, it seems like the kind of "mysterious magic" that novices fall for.
Ah, I wondered if it was some such nonsense. I could not see the connection with horns, though, so thought I might have misunderstood. To me 'charge coupled' is something to do with light sensors or delay lines.
Usually those xover caps , bipolar ones (if they are electrolytes) doesn't need biasing, equally film caps, which are in the pictures won't needing it either.
Any electrolytics can be nonlinear, with a change of c with voltage. Since you can easily buy film for less than 4x the cost of a decent 'lytic in most values, biasing is usually a waste of time. Could be useful if you are talking 2000+ uF of capacitance for a DC block or 3rd order sealed, but otherwise silly.
Apart from normal electrolytics, most caps are symmetric. That means that any distortion will be 3rd order. Adding a DC bias makes the distortion 2nd order and probably raises the level of distortion. Some people may prefer this but it is moving away from fidelity of reproduction.
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