Check this out.........I used a hand held sound meter and the official IASKA test CD to produce 50, 150, 350, 2000 and 6000 hz signals and measured the sound pressure level in my coupe using C weighting. I took these reading at 3 sound levels 10, 15 and 20 (I know the stock HU will go to 31, but if I am going to measure any higher volume I'll need to use ear plugs! ) Anyway, I entered the data into excel and posted the graph. Has anyone else done this? See my sig for details of my system.....can anyone make any suggestions on tuning this system?

Thanks in advance, Shooter