I have a 3802 with a Paradigm ps1000 that I've had for about 7yrs. I have the receiver's x-over set to 80hz using the LFE out and the subs x-over turned all the way up. The deal is I can adjust the subs x-over from 80 to 150hz and clearly hear the change. Shouldn't the receiver clip everything above 80hz. Is there a chance my x-over has degraded and the increase I'm hearing is actually the 80hz signal?