Beta Three, Speaker System, models:

CS4615A	User Manual
MU Pro MU12	User Manual
MU Series Pro	User Manual
MU series	User Manual
MU15a	User Manual
MU215	User Manual
MU401	User Manual
MU8	User Manual
Meline Series	User Manual
Professional Theater Series	User Manual
QS400	User Manual
QS600	User Manual
R4	User Manual
S1200Na	User Manual
THUNDER Pro Series	User Manual
THUNDER Series	User Manual
TLA-121	User Manual
TLA-121F	User Manual
TLB-121F	User Manual
TLB-218F	User Manual
TW Pro Series	User Manual
TW215	User Manual
t10a	User Manual