Hartsfield Crossover Points?

[robertg]

I'm using a 130A woofer, 2482 mid and a 2402 tweeter. Would 450 Hz and 4500 Hz work?

[audiomagnate]

I'm no Hartsfield expert but 500 and 8000 are what I would start with.

[robertg]

The 2482 is good from 300 Hz to 5000-6000 Hz, so I figured those numbers would be safe.

[audiomagnate]

The 2482 is good from 300 Hz to 5000-6000 Hz, so I figured those numbers would be safe.
But does the horn go down that low? A 300 Hz horn is a fairly large beast.

[robertg]

But does the horn go down that low? A 300 Hz horn is a fairly large beast.
I'm not sure, that's why I picked 450 Hz as the crossover point. I might buy a passive crossover so I can play with the crossover points. I'm not sure if it's worth the effort?

[Mannermusic]

I'm using a 130A woofer, 2482 mid and a 2402 tweeter. Would 450 Hz and 4500 Hz work?

The JBL recommended crossover pte is 800Hz. You can stretch that down to 500 with less than optimum vertical dispersion below 800Hz - it depends on the baffle config and what you are trying to do. I'd start with 700 and 5500 and see how it sounds, measures. That old gear sounds pretty good with a tube tri-amp set up. It's gonna take some work - no magic.

[robertg]

In the original Hartsfield they used the N400 and N7000 crossovers. They crossed over at 500 cps and 7000 cps. I'm assuming cps=Hz. I thought I read somewhere the woofer doesn't do much over 400 Hz?

[robertg]

Here's a catalogue form the 70's. The 2390 horn was rated at 800Hz then.