I hooked up my makeshift subs and amp (I know it's junk so please no need to capitalize on that---pioneer subs and a pyramid amp) everythings correct everythings hooked up right and now my interior speakers don't work at all and when my rca is in an awkward position- near the amp- it makes a buzzing noise but then I angle it different its fine, is the cord junk or is it completly the different angle messing with it?
first problem with the RCAs is most likely the amplifier itself. cheap amp is causing the trouble. as for teh interior speakers, the head unit is either wired incorrectly, or your unit doesn't allow RCA and powered output at the same time.