i have a kicker sx 900.4 amp and wanna use it to power 2 12" subs dvc.. since im hooked up to a 3sixty processore wich has only one sub output as many others would have i used a Y-cable to connect my preamp to an 2 channel amp now that i have the 4 channel to use for the subs how do i do it.... do i need to hook up all the channels or is there another way around .....
