I just replaced the 1.0 uf caps in my Chardonnay with V-Caps (teflons). Wow, wow, wow!
I had previously replaced the stock Alps pot with a DACT attenuator. Rather large improvement.
I also rewired direct from the CD input to the DACT (by-passing the selector switch since I only use one source) with gold alloy wire. Another nice improvement, especially in clarity and tonality (a signature of the gold alloy wire).
I had previously replaced the stock 1.0 uf caps with Auricaps. Nice improvement over the stock caps. Then I replaced the Auricaps with Mundorf Silver Supremes. Much bigger improvement than the Auricaps.
But about a week ago I replaced the Mundorfs with the V-Caps. The V-Caps are expensive as caps go, but I have never spent better money on my system, ever. My Supratek doesn't even sound like the same preamp. Better yet. My system doesn't even sound like the same system.
The openness, clarity, detail, realism, etc. is staggeringly better. I have been reading about how good the V-Caps were, but I didn't think they could be that much better than the Mundorfs. Wrong!
Before I purchased the V-Caps, I emailed Chris Ven Haus about the long break in. He said the break in issues had been over-rated and he referred me to Ralph Karsten's (Atma-sphere) post confirming the hyperbole about the V-Cap break in. I must say after one week, the V-Caps are simply fabulous.
I would highly recommend the DACT attenuator to any Supratek owner and definitely the V-Caps. My preamp is so much better now than before these two changes that I simply can't imagine how I enjoyed it before. The difference is that great in my system. YMMV.
I have been so ecstatic about the V-Caps in my preamp that I can't wait to change the output caps in my Audio Note DAC. I ordered them at the same time that I ordered the caps for my Chardonnay, but I wanted to give the caps and my system time to adjust before I made another change. Now I can't wait. As soon as I return from vacation the V-Caps will go in my DAC the first day I am back home.