did i blow my sub?!?

hmmm i havent really figured it out yet.... but one day i was driving with my music on and then all of a sudden my subs just stopped working... they come on from time to time and looks like a wire is loose.. but its not.... i rechecked all my connections and they are ok.... heres the thing tho.... is is possible that 1 or both the subs are blown?!? the reason y i ask this is cuz i have my subs setup in a series where theres only 1 set of wires to hook up my 2 12's... so im thinking maybe on is blown and is not juicin my other one...... i dont think its my amp cus the subs wouldnt play on my other amp that worked... so i dunno.. im stuck... maybe a wire is loose?!?... awww freag i give up..... i hate cars:o