A bit more info.. the amp I am using is my Clarion APX 400.4 from my last car.
It has 'speaker level inputs' for use where the RCAs on the HU are unavailable (or in the case of the wrx HU - nonexistant).
Does this mean I dont even need the LOC as i can just split the front speaker cables and connect direct to the amp?
install manual of amp for reference:
http://www.clarion.com/us/en/MungoBl...2_APX400.4.pdf