You are pushing the Kenwood too hard, that is why it is shutting down. I doubt the Kenwood has pre-outs, which is what you would need to provide external amplification to a receiver. If you just have one source, you wouldn't need a receiver, just hook up the amp and plug in a laptop/iPod/etc.
Yes that amp will definitely power the Cerwin Vegas.
Samsung PN60F5300 | Denon DBP-1611 | Roku 3
Denon AVR-1713 | EMP E55Ti | EMP E56Ci | EMP E5Bi | BIC F-12
Topping TP23 | NHT SuperZero 2.0 | Velodyne DEQ-8R