Jvc kd-r960bts
Specifically the SPK/PRE-OUT setting
I think it is REAR/REAR but just seeing what everyone else did.
The options are REAR/REAR, REAR/SUB W. and SUB W./SUB W.
Also, it doesn't have to be the JVC KD-R960BTS exactly, most JVC's are set up this way.
This is a KeeAudio premium package





