Originally Posted by Mark McIntosh
My 5-year-old old Yamaha receiver has a fixed crossover at 90. I specifically asked the guys at Orb what I was missing by not being able to set the crossover at 150 and whether it would be worth it to buy a new receiver. In fact, I email them every so often and ask them again to make sure nothing has changed. They continue to tell me that if I set two receivers up side-by-side, one at 90 and one at 150, that I would barely be able to hear a difference IF I knew what to listen for, but the difference would be very slight. Believe me, I am looking for an excuse to buy a new receiver but according to the guys I have spoken to at Orb, the crossover issue is not a big enough deal to justify spending the money. If you have the option on your receiver, then 120 - 150 is what is recommended, but go with what sounds the best to you.
I wouldn't worry about it.
I have an orb setup with an SVS PC Ultra and an HSU MBM-12.
I've tried crossing at 100, 120, 150 and 200hz.
I've found that crossing them at 100 or 120hz is the best.
150 and 200 make it very easy to localize the Subs.
I've done SPL tone tests at all the crossovers that I mentioned and Your not missing much by crossing at 100 or 120, a few decibals down at 125, but that could be my room.
You will hear all kinds of opinions for crossing them, but anything higher than 120hz seems easily to locate from my ears.