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Transmission Line Modelling Software
Transmission Line Modelling Software
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Old 5th November 2017, 12:07 AM   #821
3ll3d00d is offline 3ll3d00d  United Kingdom
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it appears to be in

Code:
%LOCALAPPDATA%\Apps\2.0\Data\Q8K89ZKR.2QY\RCVLQGO5.WVL\tran..tion_763839cbb13520ae_0003.0006_7afc777e67729b8e\Data\3.6.3.5
on my machine
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Old 5th November 2017, 01:51 PM   #822
bnilsson is offline bnilsson
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Thanks, I will take a look.
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Old 13th November 2017, 02:37 PM   #823
perceval is offline perceval  Taiwan
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I am a little late to the party, sorry...
Thanks to Peter for providing the software in the first place, and 3ll3d00d to make it available now that leonardaudio's website is gone.

I'm trying to grasp how it works, so I made what I think is a copy of the TABAQ. I've seen the simulation from Bjorn, and built 2 pairs as well.

I split the first element into 2 parts so I could add different stuffing density, dense on top, nothing for the last 1/3 of the line. I then split the 2nd element and added a branch to it, which is I believe how to add a port. I put that on the bottom.

Here's what I get, and I'm not sure what to make of this. It follows the general cutoff frequency as in Bjorn's simulation, but here, I have this big initial first hump.

Anything I should've done differently?
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File Type: png Screen Shot 2017-11-13 at 11.36.43 PM.png (25.6 KB, 429 views)
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Old 13th November 2017, 04:12 PM   #824
GM is offline GM  United States
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I don't see any value in the 'stuffing' field.

GM
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Old 13th November 2017, 09:33 PM   #825
robotc is offline robotc  Australia
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What level of stuffing did you use? The original design uses 1lb/cubic foot. Did you use the heavy stuffing setting or set the stuffing density using the custom setting?

Robert
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Old 13th November 2017, 11:01 PM   #826
markgolf is offline markgolf  United States
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Robert I ended up using the custom stuffing setting and used .5/lbs per cu ft as the best result. Heavy stuffing is too much kills the low extension.1 pound isn't bad. Light stuffing doesn't hit the ripple at all

Mark
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Old 14th November 2017, 03:00 AM   #827
perceval is offline perceval  Taiwan
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I guess my stuffing was too light.

So, the TABAQs were designed for about 70g of stuffing in the top part to just under the driver.

I figured about 40cm from top to a little under the driver. By 12.8cm deep and 10cm wide, that's 5120cm3.

70g/5120cm3 is about 0.014g/cm3.

If I change the first element's stuffing to 0.014g/cm3, this is what I get:
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Old 14th November 2017, 09:31 PM   #828
robotc is offline robotc  Australia
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That response looks way overdamped.What is the result if you use the value from Margolf, which is half of what you used?
What value of stuffing gives you the flattest response?
Robert
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Old 15th November 2017, 01:41 AM   #829
zman01 is offline zman01  Bangladesh
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Transmission Line Modelling Software
Attached is a sim with Leonard Audio TL software for TABAQ with the TB W3-315SC driver.
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File Type: jpg TABAQ sim TB-W3-315SC.jpg (76.4 KB, 376 views)
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Old 15th November 2017, 02:26 AM   #830
perceval is offline perceval  Taiwan
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Thanks all and zman for the test sim.

First, I now realized that even though I keyed in W3-315SC in Google, I got the specs for W3-315E instead. I replaced the specs for the right ones, and changed the stuffing to 0.2lb/ft3.

I got the same looking sim as yours. So, that's cool.

But... Bjorn said the stuffing should be 70 to 100g per TABAQ, so that comes up to 0.154 lb. or a stuffing density of 0.85lb/ft3.

Putting 0.85lb/ft3 makes for a way too much damped response looking like my previous example.

Now, I know the TABAQ works well with 70g stuffing, but according to this TL software, I shouldn't get the response down low I actually have.

So, where and how to overcome this discrepancy?

And btw, thanks for the help!
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