I'm going to install a powered sub (Sound Ordnance B-8PTD
) in my 2013 Rubicon (with Alpine system). I'm going to splice into the speaker wiring for the factory sub, using a line converter
to get RCA outputs. I know this won't give me major bass, but it'll work for my needs.
The powered sub has a connection for a Remote Turn-on Wire. The instructions say to wire it to the head unit's amplifier turn-on lead "or other switched 12-volt source." I'm not sure if the HU has a turn-on lead, and I want to avoid tearing my dash apart to find out. Can I connect this directly to one of the accessory fuses instead (connecting to the fuse box)? If so, which one? I see several options: M10 (15 amp "Ignition Off Draw"), M11 (10 amp "Ignition Off Draw"), M12 (30 amp "Amplifier"), or M13 (20 amp "Ignition Off Draw").
Or, is this wire optional? Can I trust the "auto power" mode that'll turn the amp on and off depending on whether it detects incoming sound signal? I don't want to risk draining my battery any time I'm parked.
Thanks for any help!