Hey guys, so I recently added JL audio coaxial speakers to the doors, the sound is great, but since the frequency range is 48hz to 24khz, the high end overlaps with the already existing dashboard speakers. This is probably introducing harsh frequencies which cannot be removed by the headunit eq neither through spotify eq. Now I cannot change the head unit (cause there are many other functions which will be lost), neither do I want to invest in an amplifier/DSP just for this. What are my options to get some good parametric eq on this car ?