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

EQ901Elite Equalizer for BOSE 901 - Select Your Series I/II or III/IV or V/VI

EQ901PS Equalizer - Powered Sub Crossover for BOSE 901 - Select your Series I/II or III/IV or V/VI

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

EQ901x Upgrade Program