Crossing near Fs

[goldyrathore]

Hi,

I am planning to use 3" full range drivers (used as mid) for a 3 way array project. I would like to cross the drivers at their lowest usable frequency to the woofers. The following are the parameters of the drivers
Fs =157, Qts=2.0.

With such a high Qts. How low can I cross to the woofer without any audible anomalies?

Thanks in advance,
Goldy

[PeteMcK]

if you're going OB, sim them in WINISD in a ridiculously large box (say 10000 L), you'll see the sort of response hump you can expect at the low end - but that assumes an infinitely wide baffle, the hump will fall off as baffle width narrows...

If closed box, just sim them in WINISD to see if you get a hump & xover above that, change the box size to deal with it, or use the hump as part of BSC...

[bjorno]

With such a high Qts. How low can I cross to the woofer without any audible anomalies?

Hi,

There are numerous ways to compensate,but as you haven't shown enough driver data and and suggested enclosure dimensions, its impossible to recommend a compensation circuit or a solution that will do the job properly.

Here is one very simple method to cure a peaking driver where the driver (enclosure) Tf order will move from 2nd to 3rd responce, Picture 1(1):

b

1(1)

[richie00boy]

If you are going active crossover, simply use the response as one half of a Linkwitz-Riley 4th-order response. Then you just need to add a 2nd-order filter with same Fc and Qc.