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Old 27th December 2008, 03:03 PM   #1
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Default Fe138 mbvr 0v9 questions

Iíve started building a pair of these; have wood cut for whatís on the drawing in the 138 thread.
A few questions about recommended bracing:

1) Was enough room (volume) left inside to add a driver rear brace/holey brace?

2) and to add inside side panel braces, to divide in trapezoids?

3) Dimensions (depth) of the triangular shaped piece in back?

4) Length of the angled pieces (compression braces for sides) in the waveguides?

5) Angular position of the same; centered @ both the throat and mouth?

6) Supra baffle; is one needed? If so how big around?

Thanx!!!
r
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Old 27th December 2008, 04:36 PM   #2
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Default Re: Fe138 mbvr 0v9 questions

We need a name for this one.

Quote:
Originally posted by serenechaos
1) Was enough room (volume) left inside to add a driver rear brace/holey brace?
2) and to add inside side panel braces, to divide in trapezoids?
Yes, yes.

Quote:
3) Dimensions (depth) of the triangular shaped piece in back?
Not too large, minimum 34mm to the side.

Quote:
6) Supra baffle; is one needed? If so how big around?
Scott?

dave
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Old 27th December 2008, 06:31 PM   #3
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Thanks!

4) Length of the angled pieces (compression braces for sides) in the waveguides?

5) Angular position of the same; centered @ both the throat and mouth? (bisecting the angle)?
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Old 28th December 2008, 12:03 AM   #4
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Quote:
Originally posted by serenechaos
Thanks!

4) Length of the angled pieces (compression braces for sides) in the waveguides?

5) Angular position of the same; centered @ both the throat and mouth? (bisecting the angle)?
Brace in the waveguide?

Optional. It needs to go with the flow. And it needs to be tight -- so tight that it pushes the sides out infetesimally.

dave
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Old 28th December 2008, 12:33 AM   #5
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might it be better to use a couple or three large dowels?

(flow-wise)?
just an idea, some do it inside cabs...
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Old 28th December 2008, 12:37 AM   #6
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Quote:
Originally posted by serenechaos
might it be better to use a couple or three large dowels?
Dowels aren't as effective.

dave
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Old 5th January 2009, 04:37 PM   #7
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Got one of 'em together...
Don't sound bad for something made out of scraps from two other projects
Actually, sounds like they have potential.

Kinda echoey though, need to figure out the internal damping thing.
Nothing inside now, just a big empty box, (with lots of bracing).
The new pdf sez "damp as you would a bass reflex cab."
Does that mean line the cab, stuff it part ways, or ???

I've built TLs & ML TLs, haven't messed w/ BRs before.
Same thing but different?
Deflex & wool?
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