Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Need help installing subwoofer with amp to oem HU and sound system (2016 FRS)

gramicci101 · 06-20-2016, 05:58 PM

There's a much easier way to do it.

Use your metra harnesses to create a passthrough for the door speaker amp. Conveniently, this amp is located behind the rear seat on the driver's side. Here's a thread that covers how to repin the harnesses and in what order. Unlike that thread, you need to connect the 1760 to the 1761 to allow the signal to still pass to the door amp. Branch off the wires for L+, L-, R+, R-, and remote turn-on and connect these to your sub amp's harness. Don't cut them completely, because you still want the door speakers to work.

Then run power and ground wires for the sub amp, plug your passthrough in between the door amp harness and the door amp, and you're good to go.

I can get pics when I get home.

06-20-2016, 05:58 PM	#2
gramicci101 Off Topic Join Date: Feb 2014 Drives: 2014 Subaru BRZ Limited Location: Vegas, baby! Posts: 4,610 Thanks: 2,369 Thanked 4,243 Times in 2,170 Posts Mentioned: 43 Post(s) Tagged: 3 Thread(s)	There's a much easier way to do it. Use your metra harnesses to create a passthrough for the door speaker amp. Conveniently, this amp is located behind the rear seat on the driver's side. Here's a thread that covers how to repin the harnesses and in what order. Unlike that thread, you need to connect the 1760 to the 1761 to allow the signal to still pass to the door amp. Branch off the wires for L+, L-, R+, R-, and remote turn-on and connect these to your sub amp's harness. Don't cut them completely, because you still want the door speakers to work. Then run power and ground wires for the sub amp, plug your passthrough in between the door amp harness and the door amp, and you're good to go. I can get pics when I get home.