[blamus]

If I want a 2.1 way setup in the front, with 1.5inch tweets on the dash and 6.5 woofers in the doors, and a 10-12" sub in the back, do I need a band pass for the 6.5" or just a low pass?

And what if I don't use a sub? Just a high pass for the tweets and low pass for the woofs?

 

[spag_bace]

it's best to have band pass for the 6.5". With no high pass filter, you cant play the 6.5" at too low volume and it's not going to sound nice as most 6.5" are not capable playing below 50hz. It's pretty easy to kill your drivers.

tweets high pass only is fine.