Jason, assuming that you actually meant the LFE level rather than the sub trim level, then that wouldn't have helped much since there's often little or no LFE present(none on music, occasionally in movies). As JC and the others suggested, increase the sub trim level and decrease the level setting on the sub itself to compensate; increasing that setting will provide a more consistent increase in the voltage level sent into the sub amp to keep it "awake".

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Enjoy the music, not the equipment.