Glockenklang Blue Rock Bass Amp HeadGlockenklang Blue Rock The Blue Rock is our next Class D amp. Like all other Glockenklang amps, it features a warm and dynamic sound up to full power. Two switchable inputs, footswitchable Drive stage with Level pot and adjustable Voice filter, on switchable 5 band eq with 3 frequency switchable Mids, switchable effects loop, mp3 player input, symmetrical, adjustable DI out, tuner out and phones output are the main features. High end mains cable and