Quote Originally Posted by RoadRunner6 View Post
Read the manuals for the sub and the receiver, both of them.

On the sub, use the R/LFE RCA input with a single RCA cable from the Sub output (pre out) on the Receiver.

..........set the volume to about 10-11 o'clock.

..........set the low pass dial all the way clockwise to the right (LFE).

On the receiver, make sure you are using the correct RCA sub jack (there are two of them). Use the sub output in the "pre out" section and not the "multi channel" section (this might be your mistake since the mutli channel is an input and not an output).

..........make sure the sub is set to ON in the advanced speaker level calibration section. Turn all speakers to "small" or set them all to 80Hz unless you have very small bookshelf or satellite speakers. Do not set any speakers to large or full band. It would help if you list all your speakers.

..........set the sub volume during the test tone sequence in the manual/advanced speaker setup procedure.

..........If you are using only the left and right speakers in a stereo/sub 2.1 setup, some receivers will not output to the sub unless you have the settings correct. Be sure to set the speakers to "main/sub" or "main and sub" in the stereo multiplex section of the manual.

Hope this might help.

RR6
Sorry to raise this thread from the dead but holy crap you just saved my sanity. I couldn't get my sub to output when playing music while it would when playing shows and movies from the same source (Apple TV 4). The issue was I had set my front speakers to large (they are but they can't hit 20Hz) and NOT small at some point in the recent year. Setting it back to small completely solved the problem and started outputting all low freq audio (crossover set to 120HZ) to the sub again. Huzzah!

No where else on the internet was this solution. You helped me today by posting this 8 years ago.

Bravo Sir.