Interestingly enough, as I was asking you guys about the LOC, I also emailed Crutchfield with the same question. The guy told me all I would need to get it to work right was:
Nissan/Subaru Receiver Wire Harness For select 2007-up Nissan and 2010-up Subaru models at Crutchfield.com
You'd think if there were HU's frying right and left from bad installs, they would know about it.
I'll probably still pick up one to be safe. I remember in my old RSX, I just bypassed the BOSE amp entirely.