I am a bit confused with the process of calibrating my SVS 16-46PC+. I Emailed Tom who replied very quickly bringing up the main point of "How hot do I have it set?" I took my SPL meter and tried to find out. I found there to be a hole at around 80hz-90hz, no matter what my sub crossover or phase was set at. Using AVIA, all speakers set to small, sub set to 80hz or 90hz, the reciever has a crossover at 100hz. So when I try to get the responce curve flat at the crossover point/area I have to realy crank up the gain, but then at around 60/65hz, with the gain cranked up,the SPL meter realy starts to go up, WAY up. Is this normal? Will this cause my Sub to bottom out at low and heavy frequencies? When I turn the volume up (-30 to -27 under refrence) and play the globe explosion on AOTC, it makes a funny thunder/rip sound at the end of the explosion. Did I bottom it? Am I doing this right? Thanks from the new guy.