djk Posted May 29, 2010 Share Posted May 29, 2010 Someone sent me mail and asked who Chris was. The e-mail (and eveything else) got deleted before I had a chance to read it. http://db.audioasylum.com/cgi/m.mpl?forum=hug&n=76255&highlight=cerwin+chris&r= Here is what an 80hz horn designed for 4Pi looks like. The small horn in the second picture (EV HP640) is 28.5" wide (for scale). Quote Link to comment Share on other sites More sharing options...
sootshe Posted May 30, 2010 Share Posted May 30, 2010 Those bass horns look like some type of an Altec horn? A 210? I'm not sure. Quote Link to comment Share on other sites More sharing options...
JL Sargent Posted May 30, 2010 Share Posted May 30, 2010 So that's a horn that you can cross INTO at 80hz? Biggun. Quote Link to comment Share on other sites More sharing options...
Olorin Posted May 30, 2010 Share Posted May 30, 2010 Not sure what you mean by "cross into," but 80 Hz would be the horn's f3. So the "small" horn is about 4" wider than a La Scala. [] Quote Link to comment Share on other sites More sharing options...
djk Posted May 30, 2010 Author Share Posted May 30, 2010 "Those bass horns look like some type of an Altec horn? A 210? I'm not sure." A single Lab 12. In use there will be four (or more) per side to go to 28hz. " So that's a horn that you can cross INTO at 80hz?" Yes, it really needs to be that big in free space (4Pi). Here is a 100hz horn I made around 1981, same width but a bit shorter (size is identical to an Altec 210 horn, but for a pair of 12s): "Not sure what you mean by "cross into," but 80 Hz would be the horn's f3." Correct. The above photo had an F3 in 2Pi of 95hz, and was actually crossed at 200hz in 4Pi to have constant directivity. Quote Link to comment Share on other sites More sharing options...
kouack Posted May 30, 2010 Share Posted May 30, 2010 Look like Altec 511 the horn to me not electrovoice 640 http://www.electrovoice.com/searchresults.php?type=downloads&searchinput=HP640 [] but look realy nice setup. Quote Link to comment Share on other sites More sharing options...
djk Posted May 30, 2010 Author Share Posted May 30, 2010 You could be right about the 511, Joe (the guy in the second picture) sent me those photos and said he was going to use an HP640 in the final install. Quote Link to comment Share on other sites More sharing options...
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