Sorry guys, yet another question.
My 2nd hand 4B SST2 amp has just turned up and were my new 4B SST2 has '4B SST2' on the power button this one just has '4B SST' so annoyingly I thought it must me an SST but on the back it is labeled '4B SST2 - Pro'
So my question is, is it a 4B SST or SST2, if so why hasn't the power swith got the '2' and what is a pro version?
Thanks again.