Charge-Coupled crossover

[macka]

Has anyone messed with biasing capacitors in loudspeaker crossover networks on these forums?

In the link below I did a study of the effects using Solen Fast capacitors. The bias is applied a the centre node of two series connected capacitors and using a 9 volt battery the voltage is applied via 2.2Meg ohms.

http://www.audioheritage.org/vbulletin/showpost.php?p=126447&postcount=164


http://www.audioheritage.org/vbulletin/showpost.php?p=126878&postcount=173

The folks at JBL seem top swear by its virtues and while I can vouch for it making a difference frankly it does not make a silk purse out of a sour's ear..at least with my equipment (Passlabs).


http://www.audioheritage.org/vbulletin/showthread.php?p=126880#post126880


Biasing does appear to improve performance of mylar and bypassed mylar capacitors and perhaps in this instance biasing a cheap way of improving performance with budget parts.

http://www.audioheritage.org/vbulletin/showpost.php?p=126880&postcount=174

http://www.audioheritage.org/vbulletin/showpost.php?p=127126&postcount=180


Although comparisons the ICW SA Clarity capacitor was audibly superior by a significant margin.

macka

 

[Taco]

Wow great read, I will try this. One question though, do you connect the - of the battery to the - of the x-over network? Both caps will block the DC if I understand it correctly.

 

[macka]

Taco,

Yes + to the centre node and - to ground, leave it on for a week to get the best results.

macka

 

[Joules]

I experimented with biasing caps for my tweets and was very pleased with the results. It also seemed that the more voltage I biased with the better it got. I wound up clicking a bunch of 9V batteries together for a total of 100 or so volts. I was using 600V polypropylene caps.

 

[Salas]

One of the reasons that tube amps sound good is that. High DC tention on coupling caps (permanent). They always sound better than when coupling in solid state.

 

[macka]

I have completed more evaluations and the Solens when biased are improved from dreadful to cold and clinical lacking tone and true fine detail.