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Original Message

Midrange horn directivity and "near field" position

Posted by KanedaK on January 10, 2022 at 22:47:11:

hi all,

I've been using the same EV SM120 (see link) midrange horns for many years, in the 500 to 6000Hz range. Driver is John Allen A55G, 1inch (more like 3/4 inch) screw-on driver.
The SM120 horn has a very wide 120° horizontal dispersion.

I'm tempted to try the new super cheap PRV D2200Ph 2inch driver with ZXPC 18 x 10 horn, which is a modern horn with a 90 x 40 directivity and is very similar to the "best" Klipsch mid horns (K510, K402) in expansion. this combination has been measured extremely linear and low distortion on the 400 to 9000 range on the Klipsch forums.

My main question is relative to the shape of the horn and its directivity.
I'm listening in what can be considered near field (for a big horn system): around 10feet from the speakers.
so far so good, the associated tweeters (Beyma CP25) have a 100° horizontal dispersion and it all sounds very good together.
What would happen if I switch horns? Won't I lose a lot of the diffuse sound, and get something that is overly directive / dry? My speakers are along the long wall and side reflections are somewhat of a non issue in my current room.
Also, I fear the modern ZXPC horn might be more beamy, and won't match the polar characteristics of the CP25 tweeters?

Reason why I wanna try is I keep reading about the superiority of 2inch drivers but I know there's more to it than just throat size.

would you guys try it? the price is certainly cheap enough but still, wasting money isn't something I enjoy.

Thanks!