I had my ut4 rebuilt. My gain switch lights up when pressed. Steering wheel controls work. I have the oem speaker boxes with 5 inch sub just not in. No amp though. (Currently has 6x9s) How can I wire an aftermarket amp to the gain control and the head unit? switch on the dash? Also looking at after market subs in back hatch. What would be easier?

 

I wanted to share the subwoofers I ended up finding that fit in the boxes. Couldn't find anything to fit the original mounting holes. The holes of these boxes were 4"
I went with the Dayton 4 1/2 Cf120s carbon fiber
-Overall Outside Diameter 4-7/8"
Overall Depth 2-5/16"
Baffle Cutout Diameter 4" Mounting Hole Diameter
Power Handling (RMS) 30 watts
Power Handling (max) 60 watts Continuous Program Power -- Impedance 4 ohms
Sensitivity 89.1 dB 2.83V/1m
Frequency Response 50 - 15 000 Hz Voice Coil

 

How do they sound?

 

@88BLKTransAmGTA :

Can you post a picture of the radio installed in your ride ?