The Russound amp will only work for you if you have the capability to connect each speaker directly to the it. If there really is only one speaker wire feeding all eight speakers, the Russound is not going to be a viable option for you. If that’s truly the situation, you’ll need to take an ohm reading across that speaker cable with a VOM meter, and then get an amp capable of driving that impedance load. The amp could be fed from the Zone 2 line-level outputs from your Denon, if it has them.
Regards,
Wayne A. Pflughaupt
Regards,
Wayne A. Pflughaupt