Each channel of the Teac is already configured as a bridged amplifier, specifically a single rail, bridge tied load, (BTL), inherent in the Tripath TK2050 chipset. Two channels cannot be bridged, but they can be paralleled, as described in the datasheet -
http://www.tripath.com/downloads/RB-TK2050.pdfThis is not practical for the existing Teac boads as it would require -
1. Implementing jumpers to configure it for parallel operation, which would have to leave the circuit board/ground plane, exposing signals to rfi and current loops (in technical terms, a roiling cauldron of crap) and
2. Consolidation of the 4 output filter toroids (2/channel) to 2 larger, higher current output toroids for the now paralleled output.