So Ive done several searches and couldn't really find what I'm looking for. Hopefully someone here can help point me in the right direction... When I was a member on 'G35Driver.com' someone had done a full, step-by-step, write up of exactly how to route wiring, what wires to cut/splice into, etc. when installing and aftermarket amplifier. Is there anything on here similar to that? I'm installing an aftermarket sub and amplifier, in a 2015 Expy, with the stock MyTouch and Sony sound system. Need to know where to route the amp power wire through the firewall, and where to tap into for a LOC. Thanks in advance for any help.