maddriver :-
any speaker u get , u will have to put them on high pass... there is no 6x9 or 7x10 invented yet tht can run full . simply cause the cone area is very small to produce heavy bass. and the problem worsens when u put a sub. cause sub flexes air in the trunk and cause of that air presure , the excursion is actually higher on the speakers which worsens the situation for them. i would recommend u get speakers which can provide u with good solid mid bass all the way till about atleast 65-70hpf.
2) next thing remember , tweeters dont blow up cause of xtra treble. they actually blow up cause of distroted mid bass signals. when ur mids distrot , it sends distroted signals to the tweeters attached to them which blow them up. and thts exactly wat happens when ppl put in infinity , jbl , polk , kicker.... etc .... they think they have put dunno wat cheetah speakers and try to run them at no cutoffs giving ful bass and as the result , tweeters blown.and then they cover up by saying "jbl to china ka hai original nahi hai" and for kenwood 718 , their tweeters are so damn deafening , tht b4 u reach distrotion lvl , u have to actually get them down lol . still i have seen ppl blowing 718 tweeters as well ...... damn... they have some ears!