Posted by Renato [ 201.5.26.86 ] on February 07, 2005 at 10:28:46:

Dears,

My name is Renato, I live in Brazil and I do not write english
fluentily (I read without problem), but I wil try post my newbie
questions...

First: Congratulations all for this space, in special for Mr. James Griffin
for your fabulous paper about "Near Field Line Arrays"

I have one site whith same projects in Portuguese about DIY audio, the
url is: http://www.mrweb.com.br/fvm/

Project
======================================================================
I think start project of Line Array and attached a post a pic..

1 x 12" < 300hz
10 x 4" >300hz and < 3k hz (approximate)
1 x Ribbon >3k hz

In mmmmmTmmmmmW

The questions:

1- Open Ballfe
======================================================================
The mid driver 4" have a High QTS, and I think made de box in OB (open
Baffle), but, in this case a simple box without "back baffle", any
problem ? I use this calcule:

344 / 300hz / 4 = 28,6 cm

Then, the box result (approximate):

120cm (h) x 15(w) x 29cm (d)

This is correct, any problem ?

2- Width Baffle
======================================================================
I do not know how the importance of Baffle Frontal in a speaker,
basicaly:

What ideal width box in this case, and why ?

Tks,

Renato

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