Hello Ken Cosco,
I’m going to need a bit more information regarding your setup, how many speakers, make / model, and their intention eg surround rear or surround L and R.
The Denon provides the following output:
Number of Power Amps 11
Power Output (8 ohm, 20 Hz – 20 kHz, 0.05% 2ch Drive) 140 W
Power Output (6 ohm, 1 kHz, 0.7% 2ch Drive) 175 W
The Monoprice device offers the following output:
A true 200-watt experience. Unlike most amplifiers or receivers, the Monolith’s 200 watts per channel rating is measured with all seven channels driven across the full power bandwidth of 20Hz to 20kHz into 8-ohm loads.
So depending on your speaker setup you may very well not need the Amp as the outputs on the Denon are already amplified.
If the Denon is not powerful enough to drive your speakers, you would simply wire the outputs on the back of the Denon to the Amplifier as illustrated on page 80 of the manual for the Denon AVR-x6700 manual here.