High Efficiency Speaker Asylum

A cheap exponential is much better than the 2370 JBL horns

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hollowboy

In Reply to: RE: Best use of 2425J posted by hollowboy on June 17, 2021 at 01:13:23

The exponential Dayton H812 is substantially better than the JBL 2370 (which costs 5-10 times as much).
See link for comparison.
On axis, the expo horn was lots better (louder / flatter for the same input).
Off axis, it was still better, but the margin was smaller.
imgur link (Open in New Window)

Edits: 06/23/21

Follow Ups:

RE: A cheap exponential is much better than the 2370 JBL horns - freddyi 15:33:27 07/19/21 (1)
yep plus I have respect for PWK's exponential designs. Do you know of any cheap exponential horns which can work well to 500Hz?
Karlson Evangelist
- RE: A cheap exponential is much better than the 2370 JBL horns - hollowboy 19:32:31 07/19/21 (0)
  RE "cheap exponential horns which can work well to 500Hz?"
  The horn I chose + like: a pair of "long throw" (305mm deep), 2 inch horns from ebay vendor ZXPC.
  https://www.ebay.com.au/itm/331676072699?euid=43d4a464c16543d997cc1fd0f70e9067&cp=1
  I mounted them in a cabinet (some gutted JBL Cabaret cabs), and extended the mouth to 50*70cm. I found that it is quite easy to get this horn sounding good. You may have forgotten, but you've already seen a thread about this - see post 39 :)
  https://www.diyaudio.com/forums/full-range/275899-paper-cone-frame-driver-front-horn-4.html
  Since you like to play loud, I guess you'd enjoy this type of horn loaded with a small, robust cone mid playing 500-2000Hz.
  By contrast: I've also recently been experimenting with cone drivers on an old 2 inch Community Audio horn (built for the M200), thinking I might repurpose the horn flares. Sadly, it doesn't seem to be as easy to get the Community horn sounding good. Maybe because the throat is long (nearly parallel) and the mouth is relatively small.
  I bought these Community boxes for parts ...not realising one of the M200 drivers was missing :(
  The single M200 driver I have gave good measured results on my horn (better than the spec sheet), as previously posted on this forum:
  https://db.audioasylum.com/mhtml/m.html?forum=hug&n=181921&highlight=community+m200&search_url=%2Fcgi%2Fsearch.mpl%3Fsearchtext%3Drs%2B40-1272%26b%3DAND%26topic%3D%26topics_only%3DN%26author%3D%26date1%3D%26date2%3D%26slowmessage%3D%26sort%3Dscore%26sortOrder%3DDESC%26forum%3Dhug
  
  Edits: 07/19/21

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