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In Reply to: RE: I made mine, but... posted by Lew on July 29, 2016 at 07:46:22
Lloyd does not deserve the credit. This simple circuit has been in use for a number of years. I have seen it implemented in amplifier output stages for many years. There was a company I think named Encom that offered them many years back as a add on to speakers. Basically a resistor/capacitor in series across the plus and minus terminals.
Edits: 07/31/16Follow Ups:
They still made them a few years ago. Im pretty sure they used a cap and resistor in series like Walker.
ET
"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
Do you mean
I wouldn't guess that these are any cheaper than the HDLs.
The bare wire ones were a little over one hundred. Very basic wire and case. I think they are made in Asia, could be wrong.
ET
"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
Yep, I think I bought the Enacoms years ago for around $80. WAY cheaper than the Walker's. Don't know if they're as effective, but I'm not about to spend $700 to find out. The DIY option looks very interesting and a lot more practical from a financial stand point.
Yes you can beat the Enacom yourself for less than they cost using much better parts than they do.
ET
"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
Gonna do some for my system.
I know in the back of the Phase Linear PL400 there is a RC network that is very close in values to what has been recommended here. I know it's a Zobel but the values if I'm correct are either .1/.01uf with a 8ohm resistor on the speaker binding post. I have to double check. It's uses a Quasi-Complementary NPN output stage.
So I will do the one DIY version on your site with bare wire ends. :)
Not sure, but that network is probably there to keep the Phase Linear stable at very high frequencies and/or to protect the driven speaker from the oscillation of a Phase Linear if it goes unstable, which was known to happen if the load capacitance got to be too much for the amplifier.
Yo Cougar, I expect a full report!
LOL!
two 10 ohm (5 ohms) 1 watt resisters in Parallel and with a .1uf caps. So it's not as close in values as I thought. My Bad! :)
Hopefully this works out like everyone here who has made theirs.
What should expect or not expect to hear when I first connect them? more quiet background, depth or wider soundstage?
If they just brought the prices down to a reasonable level!
They have been around for a long time so I can only imagine that they are making the business model work AND they have some products that really DO work like the Walker SST silver paste. But it took me about 30 minutes to find an alternative that works just as well and that ounce for ounce costs a lot less!
I don't get it, but hey, if it's working for them and they have anough customers, who am I to judge? (I know...except I kinda just did...but I'm trying to be respectful here).
Your main point is probably correct; the idea is not terribly esoteric.
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