Do you want to add aftermarket subwoofers to your Acura TL? If you have a TL from 2004 to 2008 that uses the factory amplifier (they all do unless you removed it) then you can use this t harness to get a low level sub signal from the factory radio and the amp turn on as well from one location without removing the radio.
This harness connects to the factory amplifier plug and gives you an RCA out and a remote lead (12v power) for your aftermarket amplifier. It makes adding a dedicated subwoofer amp easy and you can use it with the factory radio or an aftermarket radio if you use one of our DIY or plug and play harness to install your radio.
This is a low level signal with 1V of output at max volume so you will need to turn the gain up on your amp or use a line driver to increase the signal.
Here is video demonstration start the video at 30:00. https://youtu.be/3RuAGS7Tz5g?t=1829