Made an observation between yesterday and today while working on my system (switched out a Rockford P8004 with an Eclipse 36501). I have 3 sets of preouts from my 8400 and am currently only using the first pair and one of the sub outs. While running test tones with the Subwoofer Output switched to ON in the HU menu and the gain fully backed off on my amp, I still get a CRAPTON of bass output from the sub. With the SW on OFF in the HU, I'm able to dial in the sub level using the gain control for sub to an appropriate level (just can't adjust it from the HU).
I double and triple-checked the connections on both the amp and HU and things are wired properly. The sub is wired properly both internally and externally. The Eclipse amp only has switch selections for 4ch/5ch and with it selected to 4ch, there's no output from the sub whatsoever.
Anyone have any idea what's going on? The system will work as is, but I feel like something's not right.