Pioneer TS-WH500A

Recently installed this under seat powered subwoofer. But instead, I mounted it behind the hatch/trunk. The sound is so much fuller now and I have the EQ settings on the radio at Bass - -8, Mid - 5, Treble - +8. Installation was not hard, I did not use a Line output converter though. I just tapped the speaker wires behind the multi-media unit. There was another member here that used a Blaupunkt unit and I basically copied his installation.

Here is the youtube video. https://www.youtube.com/watch?time_continue=114&v=0sa4VYDZyVs