i had a friend hook my 2 kicker cvr's 12s up and he hooked the wires on the subs wrong and i took it to a local shop and they told me that they are blown or the voice coils are blown but i hooked them up only using 1 voice coil (they have 2 voice coils) and they sounded good it was night out so i didn't turn them up to loud but if there blown are they even supposed to work or just sound shity or just not work at all.