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Old 21st April 2006, 06:58 AM   #21
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here is a picture ov the X-over


I have used a 12mH coil and a 68F capacitor.


it is just a first try without any soldering
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Old 23rd April 2006, 10:29 AM   #22
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Hi,


so now I have changed the positon from the FX-horn and my TML. Now the TML is playing alot deeper and with more control.


I have reduced (with success) the volume in the lower line to get a bit more details in the Bass.


cya Till
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Old 23rd April 2006, 10:41 AM   #23
Cortez is offline Cortez  Hungary
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Sorry, I didnt still get it, whats the special in this TML design ?
It is a simple TL, isnt it ? (the driver placed in ~1/3 position)
Otherwise do you have a measured freq-response ?
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Old 23rd April 2006, 11:06 AM   #24
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the "normal" design is that you use the surface area [Sd] from the driver for the opening area [Am]. The staring area [Ah] from the TML is 1.5 ... 2.0 times larger.

Than you have the length [l] of the TML according do the resonace frequency.

With a 12" with 25Hz would that mean:

Ah: 810cm (1.5x Sd)
Am: 539cm
l: 3,58m

The complete volume of the TML would be 241ltr.


I started with the volume. I thought that a TML needs 1.5 ..1.6 times more volume than a normal BR. My driver needs 100ltr BR so the TML has got to be 150ltr.

The reso of the driver in 160ltr would be around 45Hz. I have placed the line frequency between the driver reso (25Hz) and the volume reso (45Hz) = 35Hz

Now I know that the line has got to be 2.75m long.
Ah is 1.6 times bigger than the Am.

Using the formulas I calculated how big Am and Ah will be.


The driver is just at 1/3 of the length like in a usual TML.


hope I could explain it to you.



cya Till
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Old 23rd April 2006, 11:46 AM   #25
Cortez is offline Cortez  Hungary
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Yes, its clear now, thank you !
And why is the bottom end shorted with that wall down there ?
Or this is: "The lower camber is to adsorption a frequency at 200Hz." ?
I have a 10" driver:
http://www.d-s-t.com/link/vifa/data/m25wo-49-08e.htm
Do you think it would be appropriate for a TML ?
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Old 23rd April 2006, 12:26 PM   #26
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Hi,

Yes the the lower camber is to adsorption a frequency at 200Hz.


I will simulate the driver for you in a TML

First try would be:
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Old 23rd April 2006, 12:50 PM   #27
Cortez is offline Cortez  Hungary
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> Yes the the lower camber is to adsorption a frequency at 200Hz.
And where is the port ? I cant see anything on the pictures about this.
Otherwise it seemed to work really ?

> I will simulate the driver for you in a TML
Thank you very much ! I like this design, cause I wanted a similar
layout, cause I have also a fullrange what could go to the top.
Its a fostex fe-166.
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Old 23rd April 2006, 01:34 PM   #28
Eva is offline Eva  Spain
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Is that thing on the back wall a 21" driver?
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Old 23rd April 2006, 02:36 PM   #29
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hi,

it is a 31" (FW800N from Fostex).


greets Till
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Old 23rd April 2006, 02:54 PM   #30
Eva is offline Eva  Spain
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What a crazy thing
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