I want to install a second amp to my 6x9'* in the rear. I already have a amp on my subwoofers. Is this possible and want do I need to do this.
Depending on how much power you will be running total, You will probably need to upgrade your main power wire from your battery if your running 8 or 4 gauge. You will also need to purchase a 1 in and 2 out power distributution block to split the power coming from your battery. It doesnt HAVE to be a 1 in and 2 out if you cant find one, just as long as it will accept the gauge wire your running with your system.
Depending on the amperage draw of your amps, you will have to also upgrade your fuse rating at the battery.
Run the main power wire into the distro block then run two power wires from the distro block, one wire into each amp. You should also ground your amps at the same location to avoid any ground loop noise. Hook up the remote wire (blue) to the same location your sub amp remote wire is hooked up to (power antenna I assume) and you should be in business.
PM me if you have any questions