Axiom Home Page Forums General Discussion Home Theater Where should my X-over be with M22TI's and 20-39PC

There is an abundance of good advice here on using Avia for sub level and crossover setting.

Remember, a crossover point is not a sharp cutoff line. If you play an 80 Hz tone through a properly tuned 80 Hz crossover, each of the two outputs will receive half of the input energy. Even below 80 Hz, some of the energy will go to your mains, but most of it goes to the sub.

Thanks for the link racer! Some good reading! Huck

Keith, even more mysterious now, since the internal test tones from the receiver should definitely play through the sub if you either set THX yes or set THX no, but then manually set sub yes. The crossover is definitely 80Hz, even though the manual very helpfully says nothing, because a THX certified receiver has to have an 80Hz crossover available. Keep experimenting, but the crossover control on the sub has to be disabled, rather than enabled; your 777 will handle all the crossover duties and the internal one in the sub would just be in the way.

Thanks John, Huck