I got a new Onkyo TX-SR603X. i know it's no high end unit, but after replacing my kenwood seems to be loss of LFE. i have it hooked up to a Velodyne CHT 12. This sub use to be more then enough power, now i have to turn the subs volume all the way up to get the Bass i want. i went thru setup several times, set the internal cross over etc. can you guys think of any thing off hand i may be missing? thank's.