Zobel Network

JiggaD369 · 4th May 2005, 02:26 AM

Hi im building CAT5 speaker cables and im mostly likely gonna be installing a zobel network. my question is what resistor and cap do i need for my speakers?

here are the specs for them...

http://www.dmc-electronics.com/descr...mage%204T.html

also, when im installing the network, how and where do i install it?

Bill Fitzpatrick · 4th May 2005, 02:50 AM

I don't see the need for a zobel. What makes you think you need one?

JiggaD369 · 4th May 2005, 03:56 AM

the cat5 cable im making is 27 pair of 23 awg wire and it has a running length of 10.5 feet.

Bill Fitzpatrick · 4th May 2005, 05:05 AM

and?

JiggaD369 · 4th May 2005, 02:40 PM

alot of people have experienced their amp oscillating at 8 feet where mine is longer.

richie00boy · 4th May 2005, 03:21 PM

That's because the scrawny twisted pairs presents a capacitive load to the amp. To protect against that you need an inductor in the output of your amp, not a zobel network in parallel with it. Or just use normal beefy zip cord

JiggaD369 · 4th May 2005, 04:51 PM

well i spent over two days makin this cable and im def using it. lol. what kind of inductor and how would i place it?

Bill Fitzpatrick · 4th May 2005, 05:54 PM

About 10 turns of 14ga. insulated electrical wire wound around a 10 ohm, 5 watt resistor should do the trick. Strip the wire leads and solder to the resistor. See illustration.

Connect one end of this unit to the + amp output and the + speaker wire to the other end.

JiggaD369 · 4th May 2005, 09:18 PM

do i need buy a specific type of resistor like cermic, carbon film, etc?

Bill Fitzpatrick · 5th May 2005, 12:27 AM

A regular 5w wire wound "sand" (read ceramic cased) resistor would do for me. Others might say you need something better.

4th May 2005, 02:26 AM	#1
JiggaD369 diyAudio Member Join Date: Apr 2005 Location: New Jersey	Zobel Netwrok Hi im building CAT5 speaker cables and im mostly likely gonna be installing a zobel network. my question is what resistor and cap do i need for my speakers? here are the specs for them... http://www.dmc-electronics.com/descr...mage%204T.html also, when im installing the network, how and where do i install it?

4th May 2005, 03:21 PM	#6
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	That's because the scrawny twisted pairs presents a capacitive load to the amp. To protect against that you need an inductor in the output of your amp, not a zobel network in parallel with it. Or just use normal beefy zip cord __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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4th May 2005, 02:50 AM	#2
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	I don't see the need for a zobel. What makes you think you need one?

4th May 2005, 03:56 AM	#3
JiggaD369 diyAudio Member Join Date: Apr 2005 Location: New Jersey	the cat5 cable im making is 27 pair of 23 awg wire and it has a running length of 10.5 feet.

4th May 2005, 05:05 AM	#4
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	and?

4th May 2005, 02:40 PM	#5
JiggaD369 diyAudio Member Join Date: Apr 2005 Location: New Jersey	alot of people have experienced their amp oscillating at 8 feet where mine is longer.

4th May 2005, 04:51 PM	#7
JiggaD369 diyAudio Member Join Date: Apr 2005 Location: New Jersey	well i spent over two days makin this cable and im def using it. lol. what kind of inductor and how would i place it?

4th May 2005, 09:18 PM	#9
JiggaD369 diyAudio Member Join Date: Apr 2005 Location: New Jersey	do i need buy a specific type of resistor like cermic, carbon film, etc?

5th May 2005, 12:27 AM	#10
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	A regular 5w wire wound "sand" (read ceramic cased) resistor would do for me. Others might say you need something better.