i just installed 2 midrange speakers from kenwood 200 watts for the front and 280 watts for the back and a kenwood head unit with 3 preouts 50 watts per channel. everything was working fine until today i turned off my engine and turned it on again. i have no sound. when i turn my car on i hear power going to my speakers and my head unit is working but i have no sound. what could be wrong. could i have blown my speakers or my stock amp.