well, i cant find the rockford amp i had, cant remember if i gave it to a friend or not. oh well. i did check this sub and the wires for the voice coils are much better made than the previous one, they seem to be okay. for shiggles i plugged the other head unit in(sony) that somehow mad more bass than the other(jvc), and magically its back to slammin tech n9ne and flux pavilion. i think the rcas were deff an issue, and the other head unit (jvc) was just old and nearly dead, so back to the sony i suppose. now i just have to add the extra piece in the dash install kit cuz the sony faceplate flips down to change cds and right now it doesnt flip down enough.