You might be better off adjusting your EQ on your headunit or DSP to bring down the higher frequencies a little bit. That way you can make them a bit less tinny sounding without just cutting off output above a certain frequency
Well after about 3 hours of messing with it I got it seems I have to turn on the lpf also to take some of the highs out there were way too high that's what was causing the issue seems good now maybe a little fine time but I know now