API 5500 Stereo/Dual Mono 550 EQs with Range Switch Features Classic 550b Equalizer design Two range switches to individually alter gain steps Usable as a 550b, 550D or 550M Peak/shelf switch on Hi and Lo bands True hardwire bypass Balanced In and Out on XLR Balanced input on 1/4″ EQ In/Out switch The beginnings of [...]