Crossover question

[woody]

In this article by Dick Olsher he has this crossover for the SAL fulrange driver and the Hawthorn Augie 15" woofer. The woofer just uses a first order crosover using a 5mh inductor. Then the SAL uses a 2 order crossover made from a 76uf cap and a 3mh inductor. My question is what is the crossover type and frequency used for the SAL is it a Linkwitz-Riley, Butterworth, Besel, Chebychev or some other type ?


Tip_85

 

[AllenB]

Here is an example of a first order filter combining with the response of a woofer to give a fourth order rolloff.

 

[Lojzek]

There is a simple enough of a way to examine that. Get a tracing software (fprawn labs) to create a .frd file of the FR unit, load it to a Passive Crossover Designer under tweeter and adjust the target transfer function (frequency and level) until you get two of these responses to align as good as you can. While you are there, click target button on the tweeter and high pass response window.