hi guys. i have a 2 channel 4/2 ohm amp. how do i wire 2 dual 4 ohm subs to present a 2 ohm load? i bridged the amp and wired it all to a 8 ohm load but it was just to weak for me. also i have 1 jl daul 4 ohm is there a way to wire it to see a 2 ohm load?