EQ901 Equalizer Series

EQ901B-I/II - Replacement Upgrade for BOSE 901 I II Equalizers

EQ901B-III/IV - Replacement Upgrade for BOSE 901 III/IV Equalizers

EQ901B-V/VI Replacement Upgrade for BOSE 901 V/VI Equalizers

EQ901PS Powered Subwoofer Equalizer & Active Crossover Upgrade for BOSE 901 Series I/II - III/IV - V/VI

EQ901USB Equalizer - Digital Preamplifier - DAC for BOSE 901 Series I/II -III/IV or V-VI

EQ901 Elite Equalizers for BOSE 901 Series I/II, III/IV or V/VI