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Agree, that is a better way to evaluate their effect.

76.191.156.247

In Reply to: RE: Sorry about barging in, saw this as I mistakenly clicked posted by Muzikmike on June 03, 2009 at 15:17:14

It eliminates the issues with break-in. Just put them on, let them play for a few days, then listen carefully before and after taking them off one pair at a time.

I can see two possible ways these devices would benefit an audio system. One way, as Walker said, would be to damp the RF resonances in the speaker cable and speaker wiring. The other would be to stabilize the amp's behavior at ultrasonic frequencies. It may be the case that the filters are doing both things in most setups.

I developed the multiple-capacitor version to expand the radio frequency range over which the filters could provide damping to RF resonances. A one-meter cable will have a fundamental resonance of about 50 MHz, and this scales inversely with length. Thus, a three-meter cable would have its fundamental at 17 MHz, and would support a lot of harmonics.

The capacitor that Walker formerly used has a self-resonance of 21 MHz, as measured with the help of a neighbor with access to a Hewlett-Packard network analyzer. This means Walker's filter could do no more than damp the fundamental of many speaker cables, and would not be much benefit for the harmonics.

Follow Ups:

"In my environment" - Awe-d-o-file 08:06:46 06/05/09 (1)
I built many versions of these. Probably 75 pairs. I tried the simpler one cap/one resistor and copied Chris D's(your's) more complex three cap/three resistor version using many different values. I found the single cap/resistor version did just as well. I found that using good silver wire, solder and spades improves things. I also found using a better quality cap and resistor (of the original .01/10 ohm values, thanks Al) does best.............in my setup anyway.

I'm going to get a couple of pair cryo'ed now and see what if anything that does. Cryo has helped everything I've previously had treated. We'll see!

ET

Question "Authority", the mainstream media sucks - Go Independent and hold BOTH parties accountable instead of just the other guys!

I need music to help forget the reality of today
- Just don't cryo breakfast. - Muzikmike 11:59:13 06/05/09 (0)
  Heat treatment works much better!
  
  There is no such thing as too many records.
  There is just too little room for them!
You mean the "new" ones I just got are gonna blow my - Muzikmike 15:49:53 06/04/09 (1)
drawers off?

There is no such thing as too many records.
There is just too little room for them!
- I just can't do it.... - Awe-d-o-file 11:06:52 06/09/09 (0)
  You left yourself open for so many attacks with that statement..........
  
  I'm a nice boy...............and so busy of late it takes me 3-4 days to respond on AA........
  
  ET
  
  Question "Authority", the mainstream media sucks - Go Independent and hold BOTH parties accountable instead of just the other guys!
  
  I need music to help forget the reality of today

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