i was wondering if anyong has an rs3 with a sub in the back? also i was wondering with all the extra electronics in there if i would need another battery to run an amp and sub in the back? feed back and pictures would be great thanx.

 

I dont have an RS3, but your main concern when it comes to electronics is your alternator, not so much the battery. What size amp are you going to be running. So depending on the amp size and the ampdraw from the electronics you would need to upgrade your alternator, not add a second battery.

 

Somthing i forgot, also you should upgrade your battery to a Optima red top or yellow top, for showing your electronics off , when the vehicle is not running. The optimas last longer than standard batteries, while on and not being charged, plus they are just awsome batteries.