Welcome to my guide on installing your own HeadUnit and Subwoofer into your GR Subaru Impreza. A quick disclaimer - I am not an expert in this field, and I take no responsibility for any damage you may or may not cause when attempting this yourself. I do however think it is not difficult to do this on your own, and save alot of money in the process by doing some homework before buying up on equipment.

I hope you enjoy it and find it helpful!

Part 1 - Parts Required and Subwoofer Comparison Chart
Part 2 - Headunit and Accessories
Part 3 - Subwoofer and Accessories
Part 4 - Setting Up / Tuning.

SVXdc - Wiring Harness Pinouts - Supplier of Subaru Adapter Harnesses. Buy your wiring harness here! David can advise you on what you need for your car!

• 20 Pin (Non Navigation Units) - Subaru 20-pin radio harness pin-out
• SWC Wiring Instructions - ae64.com - Axxess ASWC Interface Installation with Subaru 20-pin Harness

Objective:

To remove the OEM Headunit from a GR Impreza, replace it with a 2Din aftermarket unit, and install an in-cabin Subwoofer to fill out the low-frequency and add bass.

Constraints:

• The OEM Harness should not be damaged or butchered.
• The buttons on the Steering Wheel should still control audio.