Klipsch Reference Series RB-41 II Owner's Manual page 21

Rf-7 II Rf-42 II Rf-52 II Rf-62 II Rf-82 II
RB-41 II RB-51 II RB-61 II RB-81 II RS-41 II RS-42 II RS-52 II RS-62 II
RC-52 II RC-62 II
RC-42 II
RC-64 II