Re: I need some help I believe...
These are the tweeters you want:
And yes, you will be going active. You need to be able to tune the crossover to whatever speakers you choose. You can use something like this for your crossover:
You'll need a 4 channel amp. Maybe a Profile AP1040 for $90, maybe something better.
As for which mids to use, I don't know. The people on diymobileaudio.com would know.
Hope this helps!
Thou hath not so much brain as ear wax.