Note also that you can adjust the sub level via the receiver's remote (at least on my 3808).

When I push the "center button" (or "select") on my MX700 remote, an on-screen GUI comes up that allows me to change any of the speaker levels, including the sub.

By remembering that, in this case, I normally keep the sub output at +4dB, I can return it to "reference" as needed without dealing with arbitrary knob settings on the sub itself.

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::