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I am in the process of have an Xono phono built from this fellow in Germany named Frank Wilker. He claims that Z-Foil resistors are the best in the world. I know many have their preferences but are those resistors that good?
And the are quite costly. I am not one to skimp but I don't want to spend where I don't have to. He is also using Supercaps.
Follow Ups:
Or does he intend to use them everywhere?
To quote from an old post by Jim McShane:
"One of my "tricks" is I never use the same type and/or brand of resistor or cap all the time in any single piece of gear. In my Citation (and any other) builds I use metal films, wirewounds, ceramic comps, and a few carbon comps sprinkled in where their tendency to drift in value won't affect things (grid stoppers, for instance). I like to use very quiet, stable resistors in critical locations such as the NFB loop(s) and such. And I use wirewounds for large plate resistors. And yes, I even use a few metal oxides (GASP!) where they are appropriate.
I don't want the amp/preamp to have a sonic signature directly traceable to any one component group."
End quote.
Do a search here for "Texas Components" or "TX2575" to find more opinions on using the Z-Foils. After all I've read about them I've used them sparingly to avoid a sense of sterility, as well as avoiding the poor house.
The sterility concern would be even more true in a SS circuit like a Pass Xono clone. An RIAA network might be a perfect place for them, given they make them with tolerances from 0.001% (new) to 0.05% (at the end of their lifespan).
He would be using them everywhere along with Super caps
...based on testing (including listening), or is he making that statement based on him feeling that they're theoretically 'the best'? Thirty years ago I used all Holco resistors in a few rebuilds 'cause the magazines were hyping them as 'the best' back then, and I bought into it.
Given the answers you're getting here and in your similar post on the Vinyl Asylum, it seems that no one who's tried an all Z-foil circuit seems to agree with Wilker's "use them everywhere" stance.
Good luck.
An expensive mistake IMHO. I've done it. Never again.
money can't buy happiness. :)
This is like asking what's the best seasoning like pepper. Might be good in small doses but a lot might be too much.
And what does best mean in this regard. Unless you try yourself, it can be hard and expensive to kit out a whole build in one type.
However my method might not work for someone getting a custom build. I like a mix and have found types I like for various applications. But I would initially build with a cheap generic metal film coz let's be real, if it isn't good with generic parts, the design must be poor. Once the design is nailed, then try different types in each position to refine the flavour. Very time consuming.
I ended up with a recipe that suits me which is a mix of bulk foil, carbon types from various manufacturers and various wire wound. No films as they have a flavour I don't like even though I build with them first.
I put them on switches so I can swap parts by the flick of a...... Coz valves, I do it live. Don't do this if you're unaware of the dangers and risks. Solid state in your valve circuits could be at risk with this kind of action so know what you're doing or switch off before switching over.
For my money, the foils work best on an input such as cartridge load but that's all I use them for. I have in the past used them more liberally but not anymore.
YMMV and all that.
!
The Mind has No Firewall~ U.S. Army War College.
I tried a pair in a shunt attenuator as the series resistor. A light and airy sound but not the best I've tried. NOS carbon film can be better, depending on which NOS you can find.
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