i tried them along time ago and found them to be bright.i was just curious what others thought about them.if they considered them to be a transparent high fi type sound or just colored on the bright side.just want some opinions..
bmf, I use them all the time with great results in my amps. I even have them in my test bed LP for my DarkBurst pups. The electrical value sets the amount of capacitance, so if you thought they were thin and bright, it's likely the one you used was the wrong value or something else in the circuit was causing the "thin and bright" tone, or perhaps it was bad. They are the cap that superceded the "Sprague" caps of yore, IIRC.
Orange Drops - Very clear and clean. More high end. I use these when I'm designing an amp that leans toward a clean chime sound.
Mallory 150's - These are slightly darker and overall my favorite. They tend to roll off a bit of the highs and in my opinion this works well for an amp that is meant to be overdriven a lot as this natural reduction in high frequency will make for a smoother and thicker sound.
Call me the oddball, but for an overdriven sound, the Xicon green chicklets reign supreme in my book. I've tried all the aforementioned caps except the Sozo (but have loads of experience w/ mustard) and for warmth and harmonic richness/complexity these things are it. Not the best choice for HiFi or bass applications, but if you've not tried these in your hotrods, you may be missing out.
Ken Fischer of Trainwreck fame had this to say about caps.
This is in reference to guitar pickups, were it probably matters
more than in an amp, let's have a read:
First capacitors come in multitude of types, values, and voltages. The Sprague Black Beauty, also known as "bumble bee caps", are really great. Of course they don't make them any more.
I have heard that Gibson has had these caps made again for the 2003 Gibson Historics, but are not being as an aftermarket item. If you have a 50's Gibson, the .02 (really .022) Black Beauty was used. I used an old Fender value, Black Beauty in my Tele. It is a .047, (Fender calls for .05, which is for our purpose, the same thing). These caps were nicknamed Bumble Bee because they had color code bands around a black body. They look sort of like a giant Bumble bee.
Let's get to the important points of choosing a modern cap. First you want the correct value. Of course, feel free to try other values than traditional ones, if you are after something different. Most humbuckers use .022 (.020), and most single coils .05 (.047). You want separate film foil, not metallized types. Mylar and polyester film works better then polypropylene film.
Since pickups put out very low voltage, the voltage rating should not matter, but it does seem to have an affect. Traditional voltage values are commonly, but not always, 200 or 400 volt ratings.
The Black Beauty caps used in old guitars were typically the 400 volt type. Another interesting point is that, if you reverse the cap end to end, it will sound different in use. I jump mine in with test clips, run the tone control through its range, and use directions my ear choose. Also, if you have many of the same type, try a bunch of them. They will vary slightly from cap to cap. It's worth the time to choose one you really like with your gear.