hey guys just wondering if you got any ideas why when ever the bass of my sub hits pretty hard the speakers cut out? i wouldnt think that its taking that much power cut my amps only runnning at 500 watts at 4 ohms?its pretty much only when the bass hits really hard but if i turn the bass down it doest do it???

thanks in advance, jeremy

HU- Pioneer 5900
AMp - kicker zx1000
Speakers- infiinity reference series 3.5 and 6x8
Sub12 inch kicker l7