Bose 302 Series 2 (II) Tandum Passive Acoustimass Subwoofers, 1990's Black, sounds great, w/covers | Reverb
BOSE 802-II 802W-II 802C SYSTEM CONTROLLER 302 TANDEM-TUNED BASS SYSTEM 1984 SM Service Manual download, schematics, eeprom, repair info for electronics experts