'modeling' open baffle speakers

[hitsware]

http://home.comcast.net/~jhyamamoto/1ob1.gif

[maxro]

Where are you going with this?

[hitsware]

Originally posted by maxro
Where are you going with this?

An easy way to plot OB frequency response using a sealed box as a model.

[Geoff H]

That doesn't take into account the rear wave, which will cause phase cancellations.

Try this: http://www.tolvan.com/edge

Play around with the shape of the baffle, and position of the driver for the best response, then tune from there. It has an option for OB.

Geoff.

[maxro]

Or, better yet try this: http://www.tolvan.com/basta/
Basta allows you to account for driver parameters, which The Edge does not.

[MJK]

Or one more option :

http://www.quarter-wave.com/Models/O...rs_1_30_07.pdf

[Scottmoose]

Martin's upgraded mathCad worksheet will knock your eyes out.

[hitsware]

Originally posted by Geoff H
That doesn't take into account the rear wave, which will cause phase cancellations.

Yes it does. Look at the lower right hand corner. The 'EQ' frequency is the cutoff frequency of the baffle. It does not show the combing effects which (in my room anyways) are moot. But it does show the HP function of the baffle.

[hitsware]

Originally posted by Scottmoose
Martin's upgraded mathCad worksheet will knock your eyes out.

Martins Mathcad stuff runs klunky on my computer. Besides the not being able to 'save' etc. I like programs that run fast and slick and facilitate 'playing' ......

[Scottmoose]

The worksheets do facilitate playing. Never had a problem with that myself.

The reason they run slow is because they are extremely detailed in terms of what they calculate. They aren't instant on anyone's machine because of the sheer amount of processing involved. Even on a brand-new machine with 2Gb RAM, massive processor etc it still took a while to run the in-room routines on a big horn I've been designing recently. The price you have to pay for accuracy.