I have a 2016 Leaf SL with the Bose stereo system. The little Bose sub-woofer behind the back seat is a joke. I've never thought I'd see a 3" sub-woofer. I can't find any specs anywhere on the factory Bose sub woofer. I'd like to replace it with a decent aftermarket sub-woofer and amp. There are only two wires running to this factory Bose sub-woofer. Are these wires simple speaker wires that I'd connect to an aftermarket amp as speaker level inputs? I figure that since there are no power lines going to this Bose sub woofer, the two wires must be speaker wires. Anyone have any info on this at all?