ya i agree with evry1 else at this point. try another amp from a friend or sumthin just to test. use all your connections going to your amp and hook them to the loaner amp. if the subs work then u no your amp is fuct
just a suggestion cus i ran into sumthin liek this real recently. if you got a RE sub check the magnet on it. i just had an 18 that was working good 1 day and the next it was fucked. we thought it was blown so we tore it down to recone it just to find out the glue that holds the magnet together let go and the whole magnet shifted from the top plate. the pole piece was rubbing against the voice coil former and pushed the coils into the magnet inner wall and destroyed the coils.
yup for that kind of money id go with audio control or maybe a 3sixty.2. theyr not crossovers but they basically do the same thing and they got more features built in
i got a blue 1 that did the same shit. only the stinger logo would come on. i found out that if u unhook the ground and hook it back up while the ignition is on it starts working fine. its definately a pain in the ass to have to do that if it messes up thow
if your not gonna run alot of power threw them and dont care much about the brand name you can git 16 guage from wal mart. its nuthin like knu koncepts but it gits the job done