Upgrading Quicksilver preamp or amp caps -- warranty impact?

as mentioned, the manufacturers can not afford to install high end copper foil caps, they retail price increase would just be too much. Also if you want to go further, replace the bias and plate load resistors with wire wound. will make the amp much quieter, and let more micro detail come through. But again, not cheap.

@hilde45, if you are going to go to the trouble of replacing caps, go at least to the copper foil caps from Jensen or Jupiter. Other than the Duelands, they are the most organic sounding caps I have tried. Will make a big difference on your quicksilvers.

@hilde45, regardless of how quiet the system sounds, it can be quieter. If you look at the specs for self noise, metal film are good, but are far from the best. The lower you can bring down the noise floor, the more micro info will be uncovered. I can't post an attachment here, but if you google vishay metal film self noise, you should be able to find the PDF vishay published a few years ago.