can someone clarify something for me , I'm trying to mate my svs pb ultra with my svs ultra towers and my setup is just 2 channel stereo with an older Yamaha DSP a3090 , it only has a fixed crossover at 90 hz which is ok for now but doesn't have distance settings to match then without cancellations so I'm using phase settings on sub currently at 70 degrees which I measured in rew to give best response. is the distance settings on modern receivers the same as phase adjustments on the sub?