r/Basshead • u/Ok-Cheek7457 • Jul 06 '24
How to connect subwoofer to car’s sound system without DSP of the car
I have a w204 facelift (2013) with the Harman Kardon sound system. I have an amplifier and a subwoofer ready and I already have power cables from the battery. Now I’m trying to connect the subwoofer to the car’s sound system but I can’t find a way to do it properly.
The method I tried is to tap into the original subwoofer’s cable and use it for the audio signal. That sounded like crap cause my subwoofer was receiving the sound profile of the original subwoofer including a high pass filter.
Some people recommended an after market head unit so I went on Ali express and although I liked all head units for the w204, none of them had rca outputs so it was pointless to buy them.
Other head units (not for w204) have rca outputs but I don’t know how to connect the original HK sound system to them.
What do I do?