My cd player has been working fine for 5 months?

but i havent had 6 x 9s on in the other day i tried hooking up 6 x 9s in i have a system in two door speakers in they worked since i got the cd player brand new then my 6 x 9 wires rubbed together and made a buzzing sound out of the subwoofers now none of the speakers work or the amp doesnt even turn on but my cd player works fine wat could this be its a pioneer deh-4900ib does it have a protection mode or anything like that