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Old 07-15-2019, 12:18 AM   #227
Scooby Newbie
Member#: 305130
Join Date: Dec 2011
Chapter/Region: South East
Location: LFT
2019 WRX
Dark Gray


Originally Posted by Subie Muchacho View Post
Which of the harnesses are different?
I believe it is the main harness that connects directly to back of the radio based on what I have been told. In other words, you can't just slap a 2019 HK unit in a 2015 - 2018 vehicle because it won't hook up. Also, the 2019 HK unit features a CAN controller for the volume going to the factory HK amp by sending a fixed signal to the inputs then using a separate mechanism to control the volume.

I guess I get what I deserve for thinking that it would be easy to just replace the HK system in the 2019 if I didn't like it.
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