chris226

DO NOT USE THE "BRIDGED OUTPUT" CONNECTION UNLESS THE AMP IS IN BRIDGE-MONO MODE!

I suggest you just go stereo and place (1) 4-ohm coil (load) on each channel.  Based on the info given, that is your best option.

Any small two channel mixer can be used to force mono (like a Behringer XENYX 502): Plug your DAC's left output into one mixer channel, and itsright output into another, make sure the "pan" (balance) knobs are centered and both signals will be combined at the mixers LR outputs.  It doesn't mater which mixer output you use, (L, R, or both) they will have the same summed/combined signal.

I'm actually going to use it for stage monitors.  It's going to be at a local bar that typically has an in-house operator set-up, then he leaves it with the band.  They have a different band every night.  Many bands (and operators) in my town are very neglectful when it comes to operating PA system's that they don't own!