I have a Visonik 800 watt amp and 2 10 inch 500 watt rms visonik subs in a ported box (visonik enclosure). This is hooked up to a Pioneer DEH-P6700MP deck. My problem is that all of a sudden the subs quit working and the next time I use it they fire right up. The power light on the amp suggests there is no problem there and I have full voltage to the amp. Any help would be appreciated.