Weird BIB Idea

[BHD]

How about a BIB line array?

Nine FE126's in a really tall BIB, tuned lower than a regular sized FE126 BIB. Wired series-parallel they'd be what, 100 db 1W/1M and 8 ohms? I'm sure there would be lobing issues, but...

They would SERIOUSLY rock.



Whaddaya think?

[chrisb]

Originally posted by BHD
How about a BIB line array?

Nine FE126's in a really tall BIB, tuned lower than a regular sized FE126 BIB. Wired series-parallel they'd be what, 100 db 1W/1M and 8 ohms? I'm sure there would be lobing issues, but...

They would SERIOUSLY rock.



Whaddaya think?

combing issues, ya think?

why not just a bipole metronome with FE207's & FE83 - I'd dare say that would rock, and cost far less

[Scottmoose]

Yup. Combing will be the order of the day.

It's an interesting idea actually, but you've have to make it a focused array (which would screw the flare), or resort to massive HF eq to get them working right over about 3KHz. FR units and arrays doth not a happy combination make.

[BHD]

combing issues, ya think?

why not just a bipole metronome with FE207's & FE83 - I'd dare say that would rock, and cost far less

Er, well I meant combing when I said lobing. Ooops.

I figured the FE126 might be small enough where one could get away with it. Actually, I've thought about a pair of metronome bipole FE168 sigmas.

[ronc]

The only way i can see to beat the comb filter effect is to curve the front baffle and establish a focus point. However the inner divider would have to be curved also.

ron

[planet10]

Originally posted by BHD
I figured the FE126 might be small enough where one could get away with it.

To do that you need to be able to space the drivers on the order of 35-40 mm centre-to-centre

dave

[chrisb]

Originally posted by planet10


To do that you need to be able to space the drivers on the order of 35-40 mm centre-to-centre

dave

Well, I guess it could be possible to get FE83 or FF85K to fit within those dimensions, but the inevitable question would be ; exactly why a line array, unless just for the experience?

FWIW, the LA subject was rode hard and put away wet many months ago. To say the least it is as controversial a subject as any in the DIY arena, and proper execution is fraught with issues that most FullRange junkies would rather soon avoid.

To be fair, the only DIY example I've heard is one of Terry Olsen's experiments. Sorry, Terry just not my cup of tea - the little RS40-1197 cleaned its clock AFAIC.

[BHD]

To do that you need to be able to space the drivers on the order of 35-40 mm centre-to-centre

Even the little Jordan drivers are bigger than that.

the inevitable question would be ; exactly why a line array, unless just for the experience?

It's simple. Efficiency and power handling. By wiring multiple drivers in series-parallel you can get significant increases in efficiency and power handling. Since the BIB is a tall relatively narrow cabinet anyway, I thought it was an interesting idea. But if it means getting poor sound it doesn't really matter.

[Geoff H]

Line arrays are replacing horns in large venues.

http://www.martin-audio.com/softtech...nLineArray.pdf

http://www.martin-audio.com/softtech/AES117-000161.pdf

I tried it decades ago. My array was horizontal, and had problems. 4 Foster/RS 4" Should have been vertical. It did not give the transient response I was chasing either, so abandoned the idea. Nothing wrong with the drivers, just the concept.

Geoff

[BHD]

Line arrays are replacing horns in large venues.

In most of the PA line arrays, they're doing the exact opposite of the concave curve in home line arrays that focus at one point like Scottmoose and ronc said. The PA systems I've seen are convex.

But if the distances between driver centers that Dave said are correct (and I assume they are), the point is moot anyway.

Too bad. The little Fostex FE83E looks like it'd make a killer OB line array.