I just picked up a pdx 1.600.and have a few questions. I didn't realize that the crossover on the amp is not defeatable. So I was running the sub signal through a 360.2 and basically it was being crossed over twice. Well I fixed that by going direct from the deck to the amp.Thought about going back and running the sub through the center channel of the 360 so I would get a higher output voltage. Also not sure about the input voltage selection switch. I think my sub out voltage is around 1.0 volt so not sure if I should go to the higher voltage switch but I am not getting the output from my sub that I think I should be. The sub is brand new as well so maybe I just need to feed it more power or it needs a bit more break in time.. I set the amp at about 350 watts. ID's website states the sub is rated at 500rms....on the box it says it is rated at 350. Not sure about that either. Hope that makes sense. Thanks.