Agree with the high belt tension. I tightened the heck out of mine and it still squeaks a little. It also draws down the motor something fierce.
So whatcha doing with this Scion xB?
2005 Scion xB walled tuned to 33 Hz on 21kw
6 - BTL 15's on 6 - SAZ-3500D's
8 - AA 6.5" poly mids on 2 SAX-125.2's
8 - Vifa soft dome tweets on 1 SAX-125.2
MechMan 250A alternator, external rectifier and adjustable regulator
5 Deka 9A31's and a boat load of 2/0 welding cable