See I don't understand why people are so upset about this "magic switch"? Under the "Ampeg" name SVT has been plastered on many SS output amps. SVT was originally so named for the TUBE output design unique for MI bass amp use. That is not considered under-handed?
Rant over, apologies to those offended (after all it is "Ampeg"?).
Rant over, apologies to those offended (after all it is "Ampeg"?).

