determining passive crossover for bullet tweeters

The caps to the bullets will go in series. Caps alone will be 6dB roll off at best. This is one place where an inductor makes a difference. Either way, its all fun.

I would reccomend anyone who's getting into building passive crossovers to use LIMP (Loudspeaker Impedance Measurement Progaramme) and an "ARTA Box" which together will generate a very accurate graph of impedance vs frequency for any system and  thus allow you to properly design filter networks based on real impedances rather than nominal ones. The box also allows the electrical phase and frequency response of the completed filter to be measured using ARTA. http://www.artalabs.hr/

if your taking my honest slightly newbish questian as an argument then you've got much bigger fish to fry.  read carefully before assuming things good sir.

this is true, but how audible would that shift be up so high?  there is nothing stopping me from using a crossover from the 2 comp driver to the tweeters, just figured i wouldnt really have to as i'd be managing its frequencies etc outside the box.

Determine the final impedance of the bullet array.. typically 4 or 8ohms depending upon how may are series/parellel connected, and then build a textbook 1st or 2nd order crossover for it.. which will be just a capacitor or an inductor/capacitor pair. http://www.the12volt.com/caraudio/crosscalc.asp#cc

Edited by Conanski - 17 April 2012 at 10:15pm

  The way my top boxes are configured is the 2" is connected directly to the speakon, the amp powering them is then crossed over at 1.5khz on the LMS, the 1" is then connected through a 6khz pass filter and then the speakon so the 2" receives 1.5khz and up but the 1" only receives 6khz and up. If you only need a simple high pass filter then off the shelf units are pretty cheap but if you to build something custom type 'crossover calculator' into google and have a look what you find.