in that case, the rear coax and seps with HU is the sound for you...

in case your going second hand, just be careful na baka damaged goods yung makuha mo...

theres a way to test:

the easy way: press down on the edges of the speaker and there shouldent be a sound while doing this

the hard way: connect it to wires then see if its clear (no static or what ever noise other than the music)

good luck sir!