A physics-defying speaker array(?)

[bongomania]

Oops. Oh well.

 

[B.C.]

Any reason for the name of the product to have a gradiant in it? (Sorry, this pertains to my Physics class and I am curious what he is using to derive the speaker design)

 

[SnoMan]

How smart can he be? He's holding the bass upsidedown!

LOL

 

[A9X]

The Bromer Sound speaker is based on two things: one is a property of air, and the other is symmetry. The property of air is the ratio of pressure to density, and it means that air flowing from a circular ring of speakers can't be compressed inside the ring, so it becomes pressurized. That's what turns wind into sound (puts the pressure in phase with the speaker cones' motion). Symmetry lets you reduce the number of speakers from the number needed for a full ring.
Our patent issues in early March and has a full explanation. In the meantime I will be happy to post more info and answer questions about the theory, the beer can woofer, etc.

There are engineers here. Please enlighten as to how it works.

 

[Wadge]

I think it is only fair that the principles behind it are not divulged yet until the patent process is concluded.

 

[billfitzmaurice]

I think it is only fair that the principles behind it are not divulged yet until the patent process is concluded.

Not necessary. Patent protection is effective as of the date of the filing, not the issuing, which is generally years later. You also are afforded a one year window between publishing a design and having to file with no loss of protection. OTOH, if you publish and don't file within a year it goes into the public domain and no one can file a patent on it.

 

[amper]

Imagine a Beowulf cluster of those...

Seriously, though, can it produce the "brown sound"? Or send a woman into ecstasy?

 

[greenboy]

Imagine a Beowulf cluster of those...

Throw in a microkernel architecture and I might ; }

 

[byoung]

microkernel == bad, Linus says so.

 

[seamonkey]

I would like to see some measurements.
Just like I'd like to see them for many cabinets.

 

[BassmanPaul]

How smart can he be? He's holding the bass upsidedown!

Now THAT was funny!!!! Thanks for the laugh of the day.

Paul

 

[mrkode]

If I ever have to play for an audience of snakes, I might give it a try.

 

[BromerSound]

Hello everyone, and thanks for your interest. I will try to answer some of your questions.

First, it is definitely practical for a gig because it weighs 45 pounds, folds up to 30 by 30 by 8 inches, and has good sound. We collected comments on the sound at NAMM, see our website.

I'll try to straighten out the five-foot thing. Due to the arrangement, the little speakers retain their own response but gain a bass response; the whole arrangement has an effective diameter of five feet, and therefore acts as a five-foot speaker would, but without the problems of large speakers because the cones are small. With a five-foot diameter, theory predicts that radiation efficiency is down to 50% at about 40 Hz, so it is theoretically flat to a low E. However, it seems to work fine with a five-string, giving a solid low B.

The punch is the punch of the small speakers plus the punch of the virtual five-foot woofer. It starts putting out bass as soon as the cones move, not after a resonance is built up.

Unlike a line array, there won't be problems with wave interence or frequency cancellation because the spacing of the speakers is not uniform.

The formula with the del operator represents the idea that, as mentioned above, the air can't compress inside the arc of speakers, so there is no wind (w) in that volume.

Nick Bromer

 

[seamonkey]

Other patented "woofer" improvements

 

[joegeezer]

Hello everyone, and thanks for your interest. I will try to answer some of your questions.

First, it is definitely practical for a gig because it weighs 45 pounds, folds up to 30 by 30 by 8 inches, and has good sound. We collected comments on the sound at NAMM, see our website.

I'll try to straighten out the five-foot thing. Due to the arrangement, the little speakers retain their own response but gain a bass response; the whole arrangement has an effective diameter of five feet, and therefore acts as a five-foot speaker would, but without the problems of large speakers because the cones are small. With a five-foot diameter, theory predicts that radiation efficiency is down to 50% at about 40 Hz, so it is theoretically flat to a low E. However, it seems to work fine with a five-string, giving a solid low B.

The punch is the punch of the small speakers plus the punch of the virtual five-foot woofer. It starts putting out bass as soon as the cones move, not after a resonance is built up.

Unlike a line array, there won't be problems with wave interence or frequency cancellation because the spacing of the speakers is not uniform.

The formula with the del operator represents the idea that, as mentioned above, the air can't compress inside the arc of speakers, so there is no wind (w) in that volume.

Nick Bromer

How about the second question that we will all ask. How much??

 

[Thor]

Ok, I'll watch as this plays out.

I can't say I'm getting a lot more than snake oil yet, but
I'll keep an open mind.

 

[Hoover]

EV once made a 30 inch woofer, and it was a total failure.

Fostex made a 30" driver also -- they may still make it, not sure -- and it seemed to gain reasonable acceptance. Check out Studio 2 @ PUK in Denmark: They've got (4) Fostex 30" drivers as part of the control room monitor system!

 

[Petebass]

I've got a 10" speaker that's flat to 40Hz. It ain't loud. What sort of efficiency can we expect from this thing?

 

[bassteban]

How smart can he be? He's holding a bass!

He might even play one, poor soul.

 

[Basshole]

Now THAT's funny.