Nope - teflon's in general are just so without sound that they let it flow through. However, that being said ...
If you put too many in series with each other you will get that slippery teflon-like sound. I also found that using them as a full bandwidth coupling cap bypass works great, like in my phono stage, since they primarily affect the treble. Nice air and transparency without adding any glare or upper end forwardness.
They did not work well for me when I tried them as cap bypasses in my speaker crossover for the mid/bass drivers. The mids were too forward and unbalanced there. But they were wonderful on the treble crossover caps as bypasses also.
One other thing, be careful on your amps. You may find that they unbalance the top end. It will still be smooth and extended, but it could result in too forward a presentation if you use them on every transistor. I suggest trying a little at first rather than a lot, maybe one on each of the + and -, just at the ends of the rails where other smoothing and supply caps are located (I don't know your amp's config so I can't say for sure what is appropriate).
Some people also say they work great as bypasses to power supply smoothing caps, but I don't know. They are rated at 600V and so should be OK, but they are film and foil and not self healing if there is a problem and you could lose the component to a short. Your choice and your risk.
Good luck,
Bob
