Capacitor Biasing in Crossovers

[GM]

Thanks for the info guys!

GM

[mah]

Link posted on current thread on this topic on the Hi Eff Speaker Asylum:

http://manuals.harman.com/JBL/HOM/Te...800SE%20ts.pdf

[mah]

One on distortion in cables and dialectric biasing in cables:

www.audioholics.com/education/cables/cable-distortion-and-dielectric-biasing-debunked

This site has a lot of good stuff on cables and other things.

[bfish]

Thanks for the info guys!

GM

You're welcome. And it's a rare day when I can say that to you.

...zero-crossover distortion is well documented...

Guess I should qualify that a bit... it's well documented in amps and active devices. I'm having trouble seeing how it would mean squat to a chunk of wire...

It's a bit amusing the number of low-component-count minimalists that forget the nasty effects of all caps and have no problem doubling the cap count to get some ambiguous "low level detail".

One of these days I'll change my signature to;

"Just another reason to biamp".

[wws944]

Roger Russell (former head of McIntosh Labs loudspeaker division) has some interesting things to say about 'high end' loudspeaker cable. See: Speaker Wire

The rest of Rogers site is also a lot of fun to read. He has some amazing info there.

[Earl K]

Hi

- I DC bias caps that feed signal into my 288-8Ks .

- It'll be 6 years this coming fall since I employed this circuit arrangement ( & I won't be going back ) .


- Why ? I simply like the sonic effects that this circuit-topology offers .

- I am amazed that people would think that there is no change to an AC signal when you pass it through a device that's holding a DC charge. Pure logic dictates that there will be some change. One simply has to decide for themselves if that change is for the better ( and/or if one can even hear it ) .

- I agree that JBL Consumers' text on the subject is somewhat weak in the area of "convincabilty." I've struggled with it in the past. There's probably a good reason for its' lack of solid argument / ie; they aren't in the business of selling caps to DIYers and in general, don't support the online DIY crowd ( getting their HiFi parts can be a nightmare ) . They seem to prefer to let the sound of their products ( that use DC-Biasing ) sell the concept ( for better or worse ) .

- FWIW, to my ears ;
(a) 2 caps end to end sound different than a single comparable cap ( of 1/2 the value )
(b) 2 caps holding a DC charge ( but not connected to a DC source ) sound different than the uncharged dual caps ( connected end to end )
(c) 2 caps connected to a DC source sound different than all of the above ( after a charge-up time period ) .

- Granted these are just nuances that will not be discernable for a lot of DIYers until they deal with more serious system issues ( such as, getting reasonably flat frequency response or matching the dynamics of their individual components )

>< cheers

[bfish]

Thanks for weighing in Earl! That answers the "is it audible" question, at least for me.

...these are just nuances that will not be discernable for a lot of DIYers until they deal with more serious system issues ( such as, getting reasonably flat frequency response or matching the dynamics of their individual components ) ...

Now that would make a great signature, or an appropriate disclaimer worthy of repeat in any audio thread!