Post by
joe603 »
https://forums.nicoclub.com/joe603-u34652.html
Tue Jul 01, 2008 9:37 am
Yup, I have a newer MTX amp that accepts high level inputs. I used the rear seat "subs" output, soldered a wire to extend the lines to the trunk and used it for the amps input. Since the factory HD uses these speakers for the system's bass, no filtering is required. The rest of the amp install is pretty much the same. Also, my MTX uses the signal as the remote turn-on (like home theater subs).
I don't have any pics, but it really isn't that hard to do, just remove the panel and cut the speaker wires. Strip and solder the lead from the HD, and extend to your amp (make sure an use either a clip on type of connector or a butt connector.
The main power wire for you amp should go directly to your battery with an appropriate fuse. The gauge used depends on your amps current draw. (can go wrong with 4/0 gauge, unless you're pushing over 3000 watts RMS!). The ground wire should match, and be as short as possible to a good chassis ground.
If this is confusing, I recommend taking it to an installer. The finished product will look much better as they have the correct tools/materials for the job.