Can you set presets that allow you to set different channel levels, and switch between them with the remote on the fly? For example, preset A has the sub on +5, preset B has the sub on -3, and you can just hit a button on the remote(no gui needed) to drop the sub level quickly.

2xAA
M80/VP150/VP160/QS8
4xM3/M22OW/M2OW/VP150OW/4xM3IC/4xM3OW
EP500/800/HSU VTF3/SVS PB2k/SB2k/SB-12