I'm wanting to add an infinity basslink to my 05 crew cab. Since I could not get bose bacause I have the split bench without a center console, are there unused speaker wires under the front seat or someware else I can use or do I have to run new wires to the head. - Thanks

Funny you should ask, I just installed one of these a few weeks ago.
If you want it to be non fading hook up both sets of wires that came
with it, probably be easiest to run them all to the HU. If you just
want to tap into the rear channels, you can pick them up at the b
pillars between the doors on each side. I hooked one up to just the
rears in an explorer once and it sounded real good. If you stick this
thing under your rear seat if will hit surprisingly loud. If you need
wire colors or more info, drop me a line, I'll be glad to help....

Ox