I have splits in my 03 corolla, and my tweeters are mounted in those round air vents in the dash (perfect fit, might i add...). It all depends on where you mount the tweeters as to what sound you get... Because theyre so small, they are highly directional so you want them to be facing as much towards you as possible. my other suggestion would be to maybe change the settings on your crossover... I dont know if all crossovers have this, but on mine, you can wire the tweeters into different sensitivity levels... so the (-) goes into its part, then you can wire the (+) into 3 different levels... i dunno take a look at your crossovers and where the tweeters are mounted. good luck with it all.