I did use the output from another device directly into the Zamp and was able to get sound from the speaker through the Zamp. I assume that is what you are suggesting by using the zone 2 out of the receiver. I need/want the to connect the passive sub to sub out on the receiver.
I suggested using the zone2 on the Denon because if that works then the Parasound amp is not the problem.
It is the hum you normally get when plugging in a powered up powered subwoofer.
Be careful, see post#17.
I have done this before with of stereo amps and it has worked. When you say read the finer print is there something in the manual that raised a red flag for you? I did not see anything.
No, I simply meant if you were to try the Denon's zone2 output then you should read the manual first because it is not as straight forward as using the main zone, but the X7200W does not have preouts for the main zone.
Did you double check to make sure the channel level controls (see page 9 of the Quattro's manual) are set to maximum? The thing is, by using just the subwoofer test tone you have eliminated several possible causes.
To summarize, make sure you check the following:
1) Set “Speaker Config.” – “Subwoofer” on the menu to “Yes”. See Denon manual page 188.
2) Set to Subwoofer "On". See Denon manual page 155.
3) Set Subwoofer Mode to "LFE+Main", (just for troubleshooting), see page 195.
4) Set Subwoofer Mode to LPE for LFE 250 Hz (again, just for troubleshooting), see page 195.
5) Set Subwoofer level to "0" (default), or higher such as +6 (also just for troubleshooting), see page 151.
6) Connect Denon's subout (either one of the two) to the Parasound Quattro's zone 1 channel 1 (obviously can be any of the 4).
7) Turn the channel level control knob for channel 1 (or whichever one you are using) fully clockwise for maximum volume. To be bullet proof, you can turn all 4 knobs to maximum.
8) Connect your passive sub to the Quattro's channel 1 (left) speaker ouput, or any other channel that you have the input connected to the Denon's subout.
As you know already, some of the above steps are redundant if you are using the subwoofer level test tone but it won't hurt to do them either.