Can You Connect Car Subwoofer Wiring to OEM Car Stereos?
It is possible to connect the car subwoofer wiring to an OEM car stereo, but the person performing the task might run into some wiring problems. Adding a subwoofer system to your OEM car stereo will add a ton of enjoyment to the factory system you have in your vehicle. To change out a head unit, which might be needed to perform this task, you will need a wiring harness adapter to complete the job successfully. If you connect these two systems together, it is recommended that you replace the speakers in the stereo system to get the best sound possible.
For more info, see How to Find Good Car Subwoofer Speakers