It's not anything I was seriously considering as I'd rather keep the 20-yr warantee and knowing which caps to replace to give any appreciative effect is beyond me, but I was in the shop where my new transformer is being installed and another customer wandered by, looked in the case and commented that he felt the Wimas were decent enough at first but would not age well, and that judicious application of pp caps would "open up" the sound quite a bit. He runs tube amps, and from the few I owned in the past I agreed that bottle amps can benefit but that I was not sure about SS amps. I've read that in certain areas pp caps can actually introduce greater noise into the system so it sounds like an endeavor fraught with pitfalls. Still, always looking for better sound, no matter how great my system sounds now. I'm trying to talk the wife into room treatments such as acoustic absorbers/diffusers on the walls and a decent carpet since we have laminate flooring in the listening room at the moment but it's a tough sell.
