Need help with crossover 2440/2360 and 2405

[aktivkampi]

Please, can anyone help me with my crossover for my 2440/2360 and my 2405. I wan't to cross them at about 9 KHz. Has someone good ideas ???. The 2405 is mounted in the 2360. What about passive EQ for the 2360 ??? I'm thankful for any ideas.

[1audiohack]

Hi aktivkampi;

I have crossed mine at 8KHz and 10KHz and think the 2360's sound fine either way. I like the 2405's crossed high so I just cross them at 10KHz.

From 1KHz to 10KHz THE 2360 will only need an EQ slope of -4.5dB at 1KHz rising smoothly to 0dB cut at 10kHz.

I did mine active so I don't have any information on a passive schematic, sorry.

I would like to see how you integrated the 2405 into the 2360. I placed my 2405 in front, I want to integrate it but just don't have the heart to hole saw the 2360, yet. Will you post a picture please?

[aktivkampi]

Hi 1audiohack

Here are some pictures of my system. At the moment, it's only a testing phase. After I find the finally position of the slots, I'll make it a little bit "nicer"
I have two corner subs with 2235 reconed in a K 140 basked. They are crossed at 63 Hz / 18 db with an aktiv crossover. As low-mid I use a 2206. They are running from 63 Hz to 500 Hz. The 2360 starts at 500 Hz and it's crossed with an 0,22 mH inductor in series and a 1,5 yF capacitor parallel. The slots are crossed with an 18 dB filter 1,0 yF + 1,5 yF in series and in between a 0,15 mH inductor. Hope you like it, after finishing the project, I'll psot some new pictures

[aktivkampi]

some more pictures.......

[Ruediger]

Hi aktivkampi,

the 2440 requires a tweeter, it's HF response drops abruptly at ca. 10 kHz, too much to equalize it.

The 2441 is a 2440 with a different diaphragm, it has a better HF response and it can be equalized such that a tweeter is not needed.

This is also true for the 2450.

So You can either swap the diaphragm or sell the 2440 alltogether and buy a 2450.

If You buy a decent digital crossover then:
1.) You can apply the CD horn correction.
2.) You can equalize the HF end.
3.) You can put the woofer and the midrange driver in the same plane by delaying the woofer.

Ruediger

[speakerdave]

JBL made the 3160 crossover to include the passive equalization for those big bi-radial horns. The schematic is at JBL pro, but you can't build it, because that tapped inductor is not available. I'm not sure it will compensate correctly with the 2440 diaphragm, which, as another poster said, drops off at about 9 or 10k. I also agree with the suggestion to use SL diaphragms. But, if you like the 2440 diaphragm in particular --I know some prefer it--I would suggest you try running it with the 3160 (i.e., without a low pass inductor at the upper end of its range) and experiment with crossing the 2405 in separately, or, as GT suggests, run it with a high-passed chip amp or similar.