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Add 3db for a pair and another 3db for mutual coupling

You won't have the money for it. But you can replicate it somehow. Especially if you have access you carpenters / woodworkers.

Isn't it interesting that 3 or 4 years ago Pioneer Pro Audio has included in its catalog the 40 years old Bertha and Levan horns designs from Richard Long & Associates ? :eek:
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Don't forget either that you will also have to shape the sound to your liking. Most of the bass happens between, say, 35Hz and 80Hz. Then you get that round "comfort" bass around 40 to 60Hz....

Have you visited a few clubs or outdoor events to see what "others" are doing?

BTW Flat-to-30Hz is not that easy to do on a home system. Imagine what it takes for a rink. :D
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So. No longer going with bass horns?

There are indeed other horn loaded bass bin designs that will out perform the Super Scooper. Like the Terra horn.
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A single cabinet will be stiffer than a double one. Just cluster them side by side. Two cabs will go lower as you will combine their mouth areas. I think that to actually fully use the 30Hz...

if you want that much meat below or round 30Hz, then look for Bertha's and Levan horns. They'll make you puke your bowels ;-)

Seeing that you have contractors to make some wood work, might well be...

Is the Eminence driver a good choice? I dunno, but it is cheap. Maybe worth testing. Qts might be a tad high for a horn loaded cab at 0.31
Also, looking at the response graph, you can see it starts...

I agree totally with you that getting it down to 30Hz will be enough. An nice boost from 70Hz down and you can get some lively bass. Not to mention than to get under 30Hz, a lot of power is needed....

18" drivers have more potential than 15" ones. Definitely the way to go. Could be new PD1850, or maybe used JBL 2242

Start with two Superscooper per corner. And add more along the way. Remember...

You gonna have to start experimenting by yourself, and see what type of bass cabinets suits better which type of music. Set aside of a few hundred $ and build some cabinets. See how they sound....

Tiny. It is how I would describe the volume that Scott had to pressurize... You probably have 20 times that volume, requiring 20 times the equipment...

In my younger days, I would go to a club...

Well. You'll need 3 or 4 times the power and twice the number of drivers if going to a bass reflex system.

In his previous post, I suggested TubeRadio to go to a modern bass horn such as Mog...