ADC Sound Clatronic Vivanco 4050 Marantz EQ-315 Wega Modul 42 E Technics SH-GE Kenwood GE-87 Pioneer GR-333 SAE 2800 Siemens RQ-300 Dynacord EQ 310 Soundwave Q-900 Thel EQ1-HQ 4 X4-Tech EQ-1000 Marantz EQ-515 Equalizer DBX 1231 Denon DE-70 Urei 537 Hitachi Kenwood GE-5020 Kenwood GE-7030 Dynimex EQ-1200 Technics Urei 537 Sony SEQ-310 Pioneer SG-9500 Technics Onkyo EQ-240 Crown Amcron Sony SEQ-310 Kenwood GE-540 Bose 901 IV Rotel RE-1010 Technics McIntosh MQ-101 Yamaha EQ-1100 Accuphase DG-28 J-Audio B.A.M McIntosh MQ-102 Soundwave Q-900 Marantz EQ-20 Pioneer SG-9800 Dynacord EQ 310 SAE Mark VII Kenwood KE-7090