That’s a good suggestion, Mb1, assuming as you say that the speakers can be biamped. To clarify, however, when the OP’s amp is used in mono mode it is not bridged. The two channels are paralleled, as I mentioned, via their output autoformers. That is of course different than bridging. And depending on the specific design the result could very conceivably be no sonic downside, in contrast to the downside that is often attributed to bridging.
Regards,
-- Al
Regards,
-- Al