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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s lowest channel.
Post Subject: 25 hz at 6db?Posted by Jorge on: 10/27/2011
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 I need to care just one octave at my 25Hz bump,

I have tried the same solution in a big room, the thing is that we not only got output at 25 hz, but a lot also at 50 hz! There was no way surgically cut it to what we needed and the result was it messed everything up. 
I finally used a tapped horn with a 12" woofer, it was clean enough not mess up things, and blended quite well.

In that room we have 3 different bass solutons working toghether,  2 ten inch pro woofers per side from 140 hz down to fs cutoff (around 45 hz) sealed enclosures, and a pair of 15" servo controlled subwoofers one per side  taking it from 50 hz.  And well the tapped horns, that add a nice punch to it all.

The big problem with this setup is time aligning everything, or finding the correct phase for all the bass drivers: If something is not perfectly in sync,  the woofers start fighting each other and you get a real mess!  We found out once that by lowering the volume of one channel we got more bass output!!!  Something was clearly wrong!

But when they all work toghether, it is very good!

This is why I would go for just one bass solution from your midbass roof horn cutoff, down to what 15 hz!

The Gas solution looks pretty good and I for one would be very interested in seeing how it comes to life!  But frankly, having all that space below just yells for an IB.

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