attemptint to model 4 Stryke SA071s with Martins MLTQWT sheets

[anannra]

hey all,

After reading some of the threads regarding Martins TL matchcad sheets, I'm attempting to model 4 stryke sa071s in a TL.

I just want a sounding board to make sure I'm using the sheets correctly.

The goal here is to come up with a TL that will be folded once.

I've multiplied the Vas by 4 (as per one of Martins documents)...

The length of the line has been set to 70in.
epsilon is set to .25 (I'm not really sure what to do with this now that I've got 4 drivers instead of one - I've picked and average ? - I guess the intention here would be that the TL would be upside down.... with the fold in the box at the bottom rather then the top ?)
So is set to 0.5*Sd
SL is set to 6*Sd
Density is set to .5lbft^3
Rport = 1.5in
Lport = 1in
n_closed = 4 (don't know what to really do with this)
n_open = 4 (don't know what to really do with this)

I'm wondering where to go next.

Any comments/suggestions would be great.

I've attached a PDF of the sheet.

 

[kneadle]

hey all,

After reading some of the threads regarding Martins TL matchcad sheets, I'm attempting to model 4 stryke sa071s in a TL.

I just want a sounding board to make sure I'm using the sheets correctly.

The goal here is to come up with a TL that will be folded once.

(I'm not really sure what to do with this now that I've got 4 drivers instead of one - I've picked and average ? - I guess the intention here would be that the TL would be upside down.... with the fold in the box at the bottom rather then the top ?)

I've never heard of a TL with this many drivers--never heard of one with more than one driver, in fact. I could be ignorant, but I'm thinking that you're not building a TL, technically speaking, so the worksheets are going to be less useful as a predictor of response.

Dave

 

[Bricolo]

don't forget to multiply Sd by 4

 

[kneadle]

Re: Re: attemptint to model 4 Stryke SA071s with Martins MLTQWT sheets

I've never heard of a TL with this many drivers--never heard of one with more than one driver, in fact. I could be ignorant, but I'm thinking that you're not building a TL, technically speaking, so the worksheets are going to be less useful as a predictor of response.

Dave

Bricolo reminded me by his post that there is one multiple driver T-Line I have seen. It's a push-push configuration though. See http://www.t-linespeakers.org/projects/tlB/index.html for this particular project.

Dave

 

[pedroskova]

Your Sd will be x4, and if wired in series, BL will also be x4...if wired series/parallel, BL ~ x2(?).

Since SL is a multiple of SD, you're looking at one honking big enclosure!

 

[anannra]

hmmm... yeah.... just caught that the SD was off...

ran a sim.... DAMN BIG BOX....

ok, well scratch that idea.

thanks anyways.


Anoop