I will be getting a new SVS sub (either the PB10-ISB or the PB12-ISD) in the very near future. I plan on calibrating it with Avia and a RS SPL meter. I have tried to use Avia on my old sub but it seems confusing as hell. Can someone explain or possibly point me to a guide on how to use a RS SPL meter and Avia to correctly calibrate my sub? Thanks.