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In Reply to: RE: What the world needs is a good 10-12" LF driver for horns !! posted by EduardG on February 04, 2016 at 18:51:04
Maybe for midrange, but not so much for maximum bass output.
In general, for a bass horn we want the mass corner to be no higher than the crossover point we want to use. The lower the mass corner, the higher the excursion, the higher the maximum output.
The 2226 has the same sensitivity below 200hz as the more efficient, higher mass corner D130. With it's much higher x-max it will have at least 6dB more output below 200hz.
A pair of high excursion 15's in a single corner horn, 146+dB without running out of x-max (60mm P-P).
Stiff laminated hex cone.
Follow Ups:
You may be right. Except I thought we were discussing 10-12" drivers, not 15".
Can't see the point?
CSS makes a 12" version of the same driver.
RCA made a 2" entry horn with an 80" mouth that had a 30hz taper rate, IIRC it was more than 12' deep.
Tens, twelves, whatever, you're not going to have a good result trying to run a driver with Fs twice the intended horn Fc. Nor is there any need to go to a fifteen inch driver for a 30Hz or lower horn. My 30Hz home theater horn sub is loaded with an eight.
Wow! For flat response down to 30Hz I would never consider anything less than 18". How did you do it and where's F3?
> For flat response down to 30Hz I would never consider anything less than 18". How did you do it...
Use an eleven foot long horn.
My 35Hz horn sub uses EVM18B and is almost 10 feet long. You mean one additional foot allowed you to achieve 30Hz with an 8" driver? Again, where was the F3 point?
F3 is 27Hz.
The low corner is mostly path length.
Use a tapped horn and one can go farther down with small drivers, like this one from work;
http://www.danleysoundlabs.com/products/subwoofers/tapped-horns/th-spud/
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