Hi Gang. I haven't checked in here in ages.... Current Supratek preamps are using the Auricap at the output. Fiddlers post on the V-cap teflon is right on the money. Teflon capacitors in general are considerably better at signal coupling than most other capacitor types when employed in any high resolution audio electronics. The V-cap teflon is a quantum leap above the rest. Any teflon film cap [regardless of manufacturer]should yield a substantial improvement over the Auricap.All capacitors do require some run in time to fully open up...BUT keep in mind that teflon based film caps do take many more hours of run-in time to open up to full bandwidth at the frequency extremes. That said: even when brand new, one can hear the superiority of a teflon cap with regards to signal purity, resolution,focus and tonal balance right from the get go. I have been using the V-cap in my Cortese,and as couplers in my amplifiers for a couple of years now and to be candid here....I just couldn't go back to the other film types regardless construction. The hype and all the superlatives given the Vcap are fully justified here. They must be heard to be believed! Hell...I was so taken aback with Telon capacitors I even use a Vcap for a bi-pass cap in conjuction with a mundorf silver supreme in the tweeter section of my beloved Tannoy Westminsters. Run-in or burn-in time: For those that want to swap out the Auricap for another cap? Some of you may want to hear this transformation occur [rather intriguing really] For those that don't have the patience or already know the score....When your not listening to your system, simply run a signal via a tuner or a cd player [in repeat mode] for a couple of weeks with the preamp turned on, there is no need to have your amplifier turned on unless you want to listen to it of course.