From my personal experience, dealing with a lot of different types of audio equipment over the years (been in a band for years, tried all kinds of fancy instrument cables etc, worked A/V jobs for a few years, have a brother that installed car stereo's...) there is some science behind it to a very limited degree.
Most of these kinds of claims are provable with sensitive equipment that can see very subtle changes in thigns like harmonics frequency response etc.
The problem in most cases (not speaking specifically about the caps, but they're likely to fall in this category). Most human hearing, something like 97% if I recall, can't tell a difference. The other 3% has extremely sensitive hearing and for them, it makes a very clear difference.
A classic example of this was a test someone did with Monster brand speaker wire for a home stereo, They took this wire, and did a blind listening test with coat hangars. Most of the people, something in the 90% couldn't tell the difference. SO you could get the cheapest speaker wire possible, and if you're not the 3%, not know anything different.
But for most expensive purchases like this, a significant percentage of the people that paid for it can 'hear' a difference because they don't want to feel silly for paying extra :)
That's my 2c... but I'm sure I could be mistaken hehehe.
If you're doing amp repairs for people, you'd likely do well to offer higher priced caps, it gives Doug extra revenues, you'd get extra revenues and they'll feel like they got a significantly better product! :)
I'd never lie to someone and say I thought it made it better if I didn't think it did, but I'd tell them they should judge for themselves before making any decision.
Give them the data, and let them decide.
~Phil
Topic: Jupiter caps are now in stock (Read 12305 times)