Jordan_Brulotte

As I have never been able to hear the Adire Tumult in person I have no idea how they perform in the real world. I will soon be constructing a bass bin for my friends audio business, that will need to be able to play in large rooms. Most places, where this setup will play, will be ~1600 ft^2, but I would like to build it with the strength to handle 4000 ft^2 rooms if need be. As he will be playing a lot of Drum n'Bass type music, the setup will need to play with authority in large areas.

Will 2-4 Tumults be able to handle this type of application in a vented enclosure? I have looked for tumult horn designs but have found nothing. Any suggestions at all, for creating an insane PA Subwoofer would be greatly appreciated. Thanks.

Allen Ross

GO PRO, With PA there's no real need to get low, and thats what the tumult does best, sensitivity is horrible on the tumult.

Also look at sensitivity and price, you can score two amazing Selenium 18 subs with 97 SPL for the price of one Tumult.

Toss them in one of their folded horn designs, mix in a nice crown Macro Tech. Sit back and feel the insanely low group delay and slap people around with bass.


you won't find a horn enclosure for the the tumult cause the EPB is so low is makes for an enclosure that would be the size of the room.

Dan mentioned a horn enclosure for the tempest that would actually be reasonably sized, he hasn't mentioned anything recently, but ask him.

Member and Founder of the \"Its Never to Big or too Loud to have in a Dorm Club\"
Everyone in college should have a 9 cuft Tempest in their closest!

Jordan_Brulotte

Those drivers do look great, however I will need the bins to be able to play as low as possible. The music that my friend will be playing often goes below 30hz.

The sensitivity is much better with the selenium drivers as you mentioned, but would 2 18"s be able to fill a 4000 ft^2 room? It just doesn't seem as though they'd push nearly enough air.

Kyle Richardson

Try the Adire Tempests in the folded horn design they just released recently. At $150ea 4 of them wouldnt break the bank and should be able to put out nice SPL in that room.

Kyle Richardson
Acoustic Visions

AOL Instant Messenger Name: kyler70
MSN IM: acousticvisions@hotmail.com

Jordan_Brulotte

Yeah the tempest horns look great too. Maybe my concerns are unjustified, but I'm still worried about room size. My DIY HT Tempest sub is awesome, but it also plays in a 364 ft^2 room.

I may have to try the tempest horns and the selenium drivers and see what could work best. I wish there was somewhere nearby me where I could audition them.

Wayne A. Pflughaupt

Greg Monfort

Since 1600ft^2 is large enough to push useful room gain below the desired BW, it becomes a simple matter of determining the SPL required based on distance. Using the worst case scenario of a 6dB loss/doubling of distance to ensure meeting your goal regardless of the room's Vb:

dBt = dB + (dB(loss) = 20 log (D2/D1 (usually 1M or ~3.28084ft))

For example you want it to hit 100dB 40ft from the speaker:

100 + (20*log(40/3.28084)) = ~121.72dB/m

I assume you want reasonable quality/durability, so best to calculate the speaker requirements based on its half power rating at the lowest frequency of interest and use digital EQ to attenuate/shape the rest of the response rather than overdriving it with boost.

That said, it's the midbass/lower mids that puts the 'kick' in kick drums and the 'thump' in the bass, so you want plenty of dynamic headroom (SPL capability) in the 60 - 300Hz BW.

GM

Loud Is Beautiful, If It's Clean

Rory Buszka

The Tempest horn sub enclosure doesn't seem to be that great for pro sound. First off, the sensitivity is very low for a pro sub like this. 97dB. Just playing around one weekend, I got an Eminence HL-10 driver (high excursion for horn loading) driver to hit 108dB sensitivity. What you want is to look at the Live Audio Board (LAB) subwoofer project at ProSoundWeb. Designed by Tom Danley of Servodrive, the LAB Horn subwoofer is a little complicated to build, but from two 12" drivers it gets enough output for six to eight 18" direct-radiating woofers. Four per side (their intended application) have been described as devastating capability, with plenty of headroom for even the most demanding outdoor gigs with 4-6 mid-hi packs. I'm currently in the process of developing a much smaller horn for the Eminence HL-10. The finished product will be less than 3 feet tall compared to the LAB's 4' height (or thereabouts). Maybe a couple years down the road I will be able to have a PA system and do weeked-warrior sound reinforcement services with this horn sub I'm designing, as it should be very cost-effective. The LAB Subwoofer is in use by several large local sound companies, all of which report very good results, but you need to be careful in the construction and wiring to follow the directions closely. The LAB Horn Subwoofer uses a custom driver, built by Eminence to Tom Danley's specifications. It is avialable from Parts Express. Look for the LAB12 GenII. For your friend's sound business, the LAB Horn Subwoofer looks like your best bet. Use at least 1 per side, but the more you use, the better. They were designed to reach into the upper 20s when used 4 to a side.

ProSoundWeb's LAB Subwoofer Project forum

Best of luck on your quest for bass.


The Eminence LAB12 GenII subwoofer driver features an improved cone-surround glue joint. There were some failures with older drivers at very high sound levels.

"It sounds like it's barfing out the bass." - Zach

michael.e

Hi all first of all,the Tempest horn is not 97db efficient.
1- its measured at 2metres distance instead of 1metre
2- its one box in 2pi space-youl find the labhorn response much like this in 2pi space.

So really its not as bad as what it looks
3-The only concern for the tempest is its power compression

Also the labhorn uses 2 12"s-it couldve been one 15"(IMHO) but easier to fit smaller drivers i guess.

You could always re design the horn to be how you want it ie lower frequency loading and even larger!
Hearing Clean 50hz in a large venue is something unusual!

The labhorn is ~97db efficient too in 2pi
Check out the documentation page on the prosoundweb forum

Cheers!
Mike.e

http://www.geocities.com/xobt/index2.html

Rory Buszka

Aren't all horn-loaded pro sound boxes measured in 2pi space (ground plane)? I guess I still have some things to learn. The two 12" woofers will cost more than the Tempest but there will be more power compression with the tempest than if the power is divided up between the two drivers. Many say that the sound of the LAB subwoofer is like that of high-end theater subs from EAW, Meyer Sound, et cetera, more than one would think is necessary for pro sound but the fidelity certainly doesn't hurt anything. It is kind of big at 220lbs with all the touring hardware on it, but so are most other large horn subwoofers. It's basically a smaller version of the ServoDrive BassTech 7 with dynamic drivers instead of a servomotor and two diaphragms.

"It sounds like it's barfing out the bass." - Zach

Jordan_Brulotte

Those LAB horns look great. They'll definately put my woodworking skills to the test.