I need some help.

Ok, i got this Eclipse 3520 amplifier laying around that i desperately want to use. As of now i have a Eclipse 5/4 (can't remember model # and i don't want to go look) powering a 12w0-4 JL sub. When i have people in my car i don't turn up the volume too loud out of curtousy (sp?). But one dude did ask if i got any sound out of the rear speakers cause it wasn't loud enough for the sub to kick in and i've noticed that too. I ain't getting sound out of the rear. I did a little research and found one guy that uses this amp to power some rear speakers. I don't know the specifics but i figured i could do the same. I would like to have double what i have now plus this amp powering the regular speakers. For a total of 2 amps powering 2 JL subs and this extra amp doing something with the rear and/or front speakers. Can anyone help?

best advice I can give you is hook it up and see what it sounds like.

i don't want to blow out anything. Also, when i fade the sound to rear speakers it only seems that any sound comes out of the sub. But i'll go see what i can do with the amp unless anyone else has got anything to say.

subs are typically a good bit louder than your average mid/tweet or coxial spekaers.

just see how it sounds thats the only way