2009

I installed two 12 inch subs with an amp and a line output converter in my Honda Accord 2009, and I wired it to the harness on the head unit but the amp never turned on. I took it to a car audio store and had them look at it, and they said that it can't be wired to the radio because it isn't...

Anyone have any advice, tips on what they did or how they did it? I see just enough room behind back seat to mount an amp and am temped to see about fitting a shallow 10" sub back there as well. The other big question is go with a 5 channel amp or a 4 channel and a Monoblock if just running 1...