Never tried, but optional, I would think.
Either one should do the job.
A-9110 - supposed to be more musical, has a preamp built-in (it's an integrated amplifier).
But way less power/control over the speakers (30W into 8 Ohm).
Crown - the opposite on everything. Less musical, no preamp, but should have amazing control over the speakers (215W into 8 Ohm).
Again - _supposed_ to be. Never heard either one.
RCA outs of course
.
You can also run the preouts from the Monolith into the power amplifier (the two RCA outs with "P").