So it looks like the 901 Active Equalizer needs to be connected to one of the tape loops as steveinaz suggested. However, I have Zone 2 speakers (Polk R15's in the patio) and the Denon AVR-5800 only passes analog sources to the Zone 2 outputs. Meaning, the source on Zone 2 must be analog because the Denon only has one DAC chip. I am looking at the user manual right now and apparently when using the tape connectors, all signals are affected. Really want to make this work, any ideas?