Here you go man. Exact same situation as yours. Read through this thread and it should answer your question.
Hooking up subs to mono block amp - Electrical-battery- Alternators- Wiring - SMD Forum
Specifically, this post:
"well its quite simple.
two separate chambers means two wires coming from the box.
which is why there are two + and two - on mono block amps.
lets take two 4 ohm DVC subs in a separate chamber box.
sub 1: coil 1 + to coil 2 +
sub 1: coil 1 - to coil 2 -
Ohm load = 2.
sub 2: coil 1 + to coil 2 +
sub 2: coil 1 - to coil 2 -
Ohm load = 2.
now what i do is i like to keep it neat, so i go buy two terminal cups since it is a separate chamber box.
mount the terminal cups to the box. (one per chamber since it is a separate chamber box)
run two cables from each of the subs to the terminal cup.
Sub 1:
one from the positive to the red side of the terminal cup.
one from the negative to the black side of the terminal cup.
Sub 2:
one from the positive to the red side of the terminal cup.
one from the negative to the black side of the terminal cup.
each sub is now wired at 2 ohm. each sub is now in parallel.
now you will need two more cables PER SUB.
Sub 1:
positive from the terminal cup to positive on the amp.
negative from the terminal cup to negative on the amp.
your amp now sees a 2 ohm load.
Sub 2:
positive from the terminal cup to positive on the amp.
negative from the terminal cup to negative on the amp.
your amp now sees a 1 ohm load.
these subs are now wired in parallel/parallel.
this is the only way to do it besides drilling a hole in the middle of the box and running two cables over to the other sub."