Ever see something like this before?
Made for JBL 375, 2440, 2309 ALTEC 288 291 | eBay
Seems that the sound waves after expanding in the phase plug would not like traveling through that long curved straight tube. I could be wrong but it sure looks like someones been smoking some wacky weed.
BillWojo
No, just appears to be limited to a mids app since the bend radius is too tight for passing much in the way of HF at high gain.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
It drives me crazy how they drilled the bolt holes for the mounting studs different on each horn. If I bought some horns that put the back of the driver right in my face, I would want them to at least be oriented the same.
Yeah I know you could probably just rotate the driver and rear cap and get them pretty close. Why not just drill the damn things the same way when you were making them?
I'm wondering if they would really work well. I know sound can travel through a tube but something long and curved? Did this setup ever make it into production at JBL?
BillWojo
Hmm, didn't look at all the pics; sloppy assembly, not orienting the mounting flange the same on both.
Again, sound travels just fine around a bend as long as its radius is large enough. Look at how large the radius of the curved tube coupled to the driver of the early WE 15 horns is, which can pass 10+ kHz at high gain, then look at the acoustically tiny 'U' shaped bends of a BLH that can pass 30 Hz at high gain.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
They are 2 inch throat, and the flanges were properly drilled for the JBL 375/2240 4 bolt pattern.Why not just drill the damn things the same way when you were making them?
In addition to the throats being a gross mismatch, when properly indexed so the driver is oriented right side up and plumb/level, one of the Altec pattern bolt holes will interfere with one of the 4 bolt holes. The jackwagon hack is to rotate one of the patterns slightly. Since it's a 1.4 inch throat driver and doesn;t belong on there, guess who's pattern got rotated.
Also, that thing is long enough that it's going to introduce a couple ms of delay, and that may have been it's originally intended purpose.
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