Subaru WRX

For the VA series WRX released in 2014 for the 2015 model year, Subaru took a different approach with the model when compared to past generations. This time, the Impreza name is dropped in all markets in which the new model is named simply as the WRX

Information provided by: https://en.wikipedia.org/wiki/Subaru_Impreza#WRX_.28VA.29

Wiring Information
For Harmon/Kardon systems,
The amp, located under the rear parcel shelf in WRX/STi, drives all of your main speakers and subwoofer.
The Amp trigger is the 2nd Antenna trigger wire (From olden days, but no longer used).
So, From the right - Illumination, Amp Trigger, Ant Trigger, GND, etc
Thanks Marty