PDA

View Full Version : Center channel crossover?



johnhb
06-29-2003, 11:00 AM
I have made up center channel speakers of vintage JBL parts of several confugurations of drivers. Current test units have two 112As and an LE-85 with a 36db/octave crossover at 800Hz. The LE-85 has the shorter of the two 1 inch horns. They work nicely but I am building three more sets and am pondering different crossovers. Perhaps 1200Hz with 12,18 or perhaps 24db/octave? Another set will have LE-111s instead of the 112As. Any thoughts, gentlemen?

Robh3606
06-29-2003, 01:18 PM
Why not 1.2k with 2307 horns 12db octave. Both drivers should be able to work well with that. You using the slats plate lenses?Nothing above the LE-85??

Rob:)

johnhb
06-29-2003, 02:19 PM
If you mean above as in frequency I thought about using an 077. Is the 2307 the longer horn, H-92? My assumption was that the LE-15 could stretch up to meet the shorter horn/LE-85 low end but the 136A with the heavier cone/coil could not get up as high so the longer horn helped the LE-85 go lower to meet the woofers upper end. Since the two woofers I am using are eight and ten inch, upper end limits should not be a problem so the short horn and higher crossover should be fine.

I believe using the lower crossover point gives the speaker more of the "horn" quality and actually makes it sound more like the sound in a theater.

I was using the high slope crossovers to avoid overlap which may hinder dialog intelligibility which is my main consideration for this speaker.

I am using the slant plate which makes grill making hell. I thought about potato mashers but thought they might not be as good with dialog due to the scattering and multipath.

Robh3606
06-29-2003, 02:44 PM
Is the 2307 the longer horn, H-92?

I don't know for sure but I think the longer is a 2391???

"If you mean above as in frequency I thought about using an 077."

Yes that's what I was thinking too.

Rob:)