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Caps and Tubes

My pre-amp is an Audio Research LS-16. It was more or less inherited. It is the only pre-amp I have ever owned.

Looking down into it through the screen on top there are four large capacitors that say "Wonder InfiniCap". There are some numeric specs on them as well.

I'm wondering if these were original to the unit or added later as an upgrade. It has four fairly large tubes. They do not appear to have anything written on them that I can see. I'm wondering how to know if these are the original tubes.

This is all academic since there is little or no chance that I'd hear much difference between different types of caps and tubes but I'd still like to know if they were original or not. Of course if no one knows I can contact AR.

Thanks,

George
n80
roberjerman
4,319 posts
 
Any markings will be on the sides! I suspect that current ARC production uses Russian 6922's. Nothing wrong with that! Tube snobs will say that only vintage Telefunken's are worth using. Sure, if one wants to pay $150+ per tube! Me, I'll stick with the vintage Russian or American ones!
n80 OP
2,100 posts
 
Thank you very much for your assistance. 
don_c55
1,025 posts
 
Wonder Caps were used in some stock ARC preamps in late 80’s early 90’s.

They are not replacements but original.
audio211's avatar
audio211
7 posts
 
If the capacitor is old. Then now is the time to change.
grannyring's avatar
grannyring
6,436 posts
 
Wonder Caps are original.  They are film caps and don’t need replacing in terms of operational shelf life. You will no doubt hear a nice improvement in sound quality upgrading  to something like  Jupiter copper foil caps or other nice foil and film caps. No doubt. 
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