I quoted your post mainly because this thing about gain knob position, which totally depends on the pre-out signal level, it's not an indication of performance particularly, just a way of matching signal voltage to the subs amp sensitivity level. You can have too hot of a signal and amplify resulting clipping, that's why you need to set gain correctly (and generally leave it alone afterwards) and not consider it a volume knob.\nCompletely agree... only wanted to illustrate that good output can be had without stressing the amp and driver. After getting them dialed in, the only times I adjusted the gain on the sub was experimenting with Audyssey to achieve the recomended ~75dB SPL... and then fixing what Audyssey did, afterwards. ;)\nWhen I want to boost my LF output, I use the AVR to boost the level as I need it. The controls on the back of the sub don't need to be adjusted once set!