Hmm...all I really even think I know about them is that they usually run on low heater voltages.
Quote by Peradactyl
alright, off topic but how do i make forum posts

Quote by The_Paranoia
a4lrocker is an offical thread legend.
Are you talking about one of these? :

They're called amp jewels. Don't know about the rest.

And if you're not talking about this, then I don't know what. Maybe just an LED?
Schecter Hellraiser Deluxe
Boss DS-1
Crate GTD65

GAS List:
Mesa Boogie Dual Rectifier Roadster