cddc
1000+ Head-Fier
- Joined
- Dec 7, 2009
- Posts
- 1,278
- Likes
- 1,146
I researched these white coupling caps and they are actually 'suppression film' capacitors, meant to reduce emission and increase the immunity of radio and electromagnetic interference. Thus i'm not sure how much of an impact they have on SQ.
Perhaps replacing the 'output' coupling caps instead would yield more SQ improvement, but i'm just guessing at this point. I believe this amp has been around since 2008, surely there MUST be someone who tinkered/upgraded the caps who could speak for the results...
https://www.mouser.com/new/vishay/vishay-f1773-x2-capacitors/
These are marketing gimmicks, just because those caps possibly have some ability to suppress some interference. Manufacturers can call them heat resistance caps, snow-white caps, gold poo poo caps, or whatever they like. But these are not main functionalities of caps. The main functionality of the 2 white caps is inter-stage coupling.
There are audible differences, as I said earlier, but rolling passive components, such as caps, won't be as significant as rolling tubes. So rolling caps is a very bad idea, as lots of caps are way overpriced IMHO. Unless you think this is gonna be your final amp and you want to max it out, rolling some $60-$200 cap is a bad option.
I think it could be dangerous for you to replace the caps from the questions you asked. If something goes wrong (for example forget to discharge the caps), you might damage your amp...better stay put.