Charge-Coupled crossover

macka · 8th October 2006, 03:23 AM

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/vbullet...&postcount=164

http://www.audioheritage.org/vbullet...&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/vbullet...880#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/vbullet...&postcount=174

http://www.audioheritage.org/vbullet...&postcount=180

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

macka

Taco · 8th October 2006, 11:05 AM

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 · 8th October 2006, 11:33 AM

Taco,

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

macka

Joules · 8th October 2006, 01:21 PM

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 · 8th October 2006, 02:11 PM

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 · 13th November 2006, 12:27 PM

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

8th October 2006, 03:23 AM	#1
macka diyAudio Member Join Date: Dec 2001 Location: Australia	Charge-Coupled crossover 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/vbullet...&postcount=164 http://www.audioheritage.org/vbullet...&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/vbullet...880#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/vbullet...&postcount=174 http://www.audioheritage.org/vbullet...&postcount=180 Although comparisons the ICW SA Clarity capacitor was audibly superior by a significant margin. macka

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8th October 2006, 11:05 AM	#2
Taco diyAudio Member Join Date: Nov 2002 Location: Place in the Netherlands	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.

8th October 2006, 11:33 AM	#3
macka diyAudio Member Join Date: Dec 2001 Location: Australia	Taco, Yes + to the centre node and - to ground, leave it on for a week to get the best results. macka

8th October 2006, 01:21 PM	#4
Joules diyAudio Member Join Date: Nov 2004 Location: Manassas virginia usa	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.

8th October 2006, 02:11 PM	#5
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	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.

13th November 2006, 12:27 PM	#6
macka diyAudio Member Join Date: Dec 2001 Location: Australia	I have completed more evaluations and the Solens when biased are improved from dreadful to cold and clinical lacking tone and true fine detail.