2397 horns with a baffle?

[Harkness]

I've been running a pair of these at home with 375s for 20+ years now. I love horn dynamics and I love how transparent and invisible the 2397s are. Just recently looking over the JBL literature I noticed it says the results were achieved with the 2440 and vertical coverage is nominally 60º with a cylindrical baffle.. I've just never seen anyone set these horns up with a baffle, including myself. Mine have always just sat on my Harkness boxes with a bit of downward incline, as I saw when I first set them up that the flattest response was measured at 30º. Closest I have seen to use with a baffle is the Westlake monitors with their iterations of the Smith horn, but that is also not a cylindrical baffle.How do we suppose the output is affected by use without a baffle..? Less than the nominal 60º of coverage using with the baffle gets presumably? Does anyone have a picture of the recommended circular baffle setup? I searched online without luck.

[Mr. Widget]

Yep, I read that about the cylindrical baffle too. I made a pair with a smaller 1" baffle and subjectively I couldn't tell if there was a difference. Back then my ability to take truly meaningful measurements was rather lacking so I never measured the effects of adding the baffle.

http://www.audioheritage.org/vbulletin/showthread.php?695-Wooden-Horns


Widget

[macsic]

Hello,
Me too after several tests with different horns I kept the 2397 then I tried several super-tweeter and I like the result with AMT-1, last year I tinkered with panels following a reading about 2397 and the result is not dramatic but it is better and my measurements with REW confirm that, the frequency response is more straight (measurements taken at the listening position) I do not know where these measurements are unfortunately but it doesn't cost much to try.

https://nsa40.casimages.com/img/2021/02/18/210218064348576623.jpg (https://www.casimages.com/i/210218064348576623.jpg.html)

However I am curious about these cylindrical baffle...

[JeffW]

Hello,
Me too after several tests with different horns I kept the 2397 then I tried several super-tweeter and I like the result with AMT-1, last year I tinkered with panels following a reading about 2397 and the result is not dramatic but it is better and my measurements with REW confirm that, the frequency response is more straight (measurements taken at the listening position) I do not know where these measurements are unfortunately but it doesn't cost much to try.

https://nsa40.casimages.com/img/2021/02/18/210218064348576623.jpg (https://www.casimages.com/i/210218064348576623.jpg.html)

However I am curious about these cylindrical baffle...

I spy another XTA user...

[hjames]

I do like that smith-horn smile!
And the great Heil combo makes it all the more interesting!


Hello,
Me too after several tests with different horns I kept the 2397 then I tried several super-tweeter and I like the result with AMT-1, last year I tinkered with panels following a reading about 2397 and the result is not dramatic but it is better and my measurements with REW confirm that, the frequency response is more straight (measurements taken at the listening position) I do not know where these measurements are unfortunately but it doesn't cost much to try.

https://nsa40.casimages.com/img/2021/02/18/210218064348576623.jpg (https://www.casimages.com/i/210218064348576623.jpg.html)

However I am curious about these cylindrical baffle...

[macsic]

:)
But a question remains, what are these cylindrical baffle for the 2397?

Do you refer with this old thread: http://www.audioheritage.org/vbulletin/showthread.php?5042-2397-baffle