At this time no current Rotel amplifier models offer bridged mono operation.
The only Rotel power amplifier design in recent history that offered this feature was the RB-1070.
Applicable Models:
RB-1050 | RB-1070 | RB-1072 | RB-1080 | RB-1090 | RB-1091 | RB-1092 | RB-1510 | RB-1552 | RB-1552 MkII | RB-1562 | RB-1572 | RB-1582 | RB-1582 MkII | RB-1590 | RKB-250 | RKB-650 | RKB-850 | RKB-D850 | RKB-2100 | RKB-8100 | RKB-D8100 | RMB-1048 | RMB-1066 | RMB-1075 | RMB-1076 | RMB-1077 | RMB-1085 | RMB-1095 | RMB-1506 | RMB-1512 | RMB-1555 | RMB-1565 | RMB-1575 | RMB-1585