sub wiring

i have 3 jl 13w7 and rockford fosgate t4000x1 bd.

how do i wire those subs?

and how much cu/ft need? (each sub)

sub 1500w  dual 1.5 ohm

amp 4000 watts rms x 1 ohm

         3000 watts rms x 2 ohms

         2000 watts rms x 4 ohms

Wire the coils of each woofer in series.  Then parallel the 3 woofers at the amp for a 1 ohm load.  The diagram below shows 2 ohm voice coils for a 4 ohm load per woofer.  Your result will be 3 ohms per woofer.

Option 2 (series) = 4 ohm load Voice coils wired in series Recommended Amplifier: Stable at 4, 2, or 1 ohm mono