Stumbled on this thread today. For the record. These are some companies I have done stuff for. Doesn't mean I designed every product for them, but I have done some sort of design (or redesign) work for them. These are ones I can think of off hand right now.
Randall
Rocktron
B-52
Hiwatt
Egnater (duh)
Companies I have
not done things for but have seen the Egnater name somehow tied to them (in error)
MesaBoogie
Raven
Rocktron within the last few years
B-52 from more than a few years ago
Wow, bruce egnater posts here.