Big E Waveguide designs

[MichaelVee]

I searched here and didn't see an existing discussion, so I wanted to post and ask the forum, and Bill, your thoughts on these unusual Big E Waveguide Loudspeakers. Scroll down and read the "Basic Theory" section in particular.

The current TB discussion begins here.

These have been around a year or more and are possibly being built by some of the big guys here on BFM, such as Harley, Leland, and others. Duke LeJeune is also in on these.

These are touted as having some unusual performance advantages and it would be good to hear how these compare and contrast to the BFM designs. I doubt they are fantastically better than BFM, just a different design. What are your thoughts?

[Chris_Allen]

Just looks like a crossfiring, ported, direct radiator to me.

[Bill Fitzmaurice]

The explanation of the 'Manipulated Vortex Waveguide' is very long on hyperbole, with no actual technical description of what it is. Supposedly they don't want to release details until a patent is granted, but being fully familiar with the patent process that explanation doesn't hold water. From what's visible externally the heritage is pretty obvious.

[But it Hertz]

If this is the same one, I think he might have posted the sketchup file here so I'm sure he won't mind me posting a screen grab here.



From this page:

The cabinet was originally a design-to-order for a client who desired response and performance of an EV MTL1 with defined chest-pounding bass without "The really low frequency drag..." as he had described to us. The 218SLS meets this criteria and sets the foudational standard for all Big E subwoofers.

Tuning frequency: 45 Hz

Frequency Response: 40 Hz to 500 Hz

Power Handling: 1200W RMS

Impedance: 4 Ohm

Sensitivity: 101db 1W/M

It uses these drivers. B&C 18PS76 18" Woofer

[Bill Fitzmaurice]

That's a bass reflex cab with cross-fired woofers, so there's nothing out of the ordinary there. And it's not aperiodic.
Before this goes any further this is not the place to discuss someone else's designs. I'm sure that if Big E wants to do so they'll have a forum of their own to do it in.

[LelandCrooks]

Thank you Bill. It is not the place.

[But it Hertz]

Should I take my post down?

[Harley]

Should I take my post down?

Reading your post....yeah....



...you could try staring it down like I do, at least that comes with beer.

[Bas Gooiker]

Harley...

[MichaelVee]

Hey Harley! What's the word..

[Harley]

Hey Harley! What's the word..

[AntonZ]

If I ever get to travel to NZ, I will come join you watch that post for a while

[1n3]

Thanks for your comments, Bill. I wondered if this would come up here. I'm bothered by the absence of factual info on this subject, but that's not for you to set straight. 'No discussion' is better than what's happening over on TalkBass, IMO.

[Chris_Allen]

I think it's time for this thread to disappear happily.