How do I connect my subwoofer and amp to my stock stereo?
The best way to connect it to a factory system is to tap into the stereo’s speaker outputs for the amp’s input signal. Then send the amp’s outputs back to the stereo’s harness, and on to the speakers through the factory wiring.
Can you add an AMP to a stock stereo?
To add an amp, you’ll have to use the factory amplifiers’ outputs for your aftermarket amp’s high-level inputs. Make sure it can handle at least 12V, otherwise you’ll need to use a line output converter (LOC) for the amp’s input.
What do you need to hook up a sub to a factory radio?
Use a Converter
You will need a line output converter if you have a factory car stereo in your car. This is because the factory head unit generally tends to have speaker wires but does not have a preamp output that can convert them into RCA signals.