The rap on caps: I get asked about caps a lot; What's best? Orange Drops, Mallorys, or the expensive "paper-in-oil" kind? What's the difference? Basicly there are 2 kinds of caps you'll use for coupling/tone caps:Polypropalyne (Orange Drop 715P, Xicon, etc.) and Polyester (Mallory 150, Cornell-Dublier, etc.) Polypropalyne tends to be brighter, can be harsh-sounding. Great for Fender-type amps. Polyester tends to be darker/smoother-sounding. Mallory 150s were used in vintage Marshalls and I like 'em a lot (I use 'em in my TopFuel boards and amps.) These differences are fairly subtle, not night-and-day different. Paper-in-oil caps are just expensive. Hi-Fi guys like 'em but they don't make much/any difference in guitar amps. Save your money. For small (picofarad-size) caps most folks agree that Silver Mica caps are the way to go over ceramic disc caps; smoother, less harsh, although there are places where a ceramic cap can work just fine (tremolos, power sections.) Above all: use your ears! "Smoothie" caps: There's times when the amp is kinda bright, harsh, or "buzzy"-sounding and you'd just like to smooth it out or kill the "buzziness". There's a couple places you can add a "smoothie" cap to kill unwanted highs. One place is across the plates of the phase inverter. Marshall uses a 47pf cap here to prevent oscillation, try 120-200pf to smooth out buzziness. Vox uses a cap here with a pot for the "cut" control. Another spot I like is between the plate and grid of the first gain stage, try 10-20pf. Sovtek Midget 50 uses 18pf here. I also do this on BuzzBombs and TopFuels for a smoother, "growlier" tone. Sweeet!

Денис, это все уже обсуждалось и не раз. Разве что разница между разными типами пленки так не описывалась... Тут ссылку на Гитарплеере на УралТон кинули. ТАм чел продает "крутые" К73 и К78 :) Я ржал...