Changing my mind - now want to build TC2000 LLT - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 27 Old 06-15-07, 08:07 PM
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Re: Changing my mind - now want to build TC2000 LLT

Have you tried playing with Winisd yet? WinISD is freeware speaker designing software that you can use to model up your speaker in different boxes and see the different effect by changing box size and tune. It also will tell you how long to make the ports for a given tune. This is what most of us are doing to answer your questions. Just follow the directions in the help file on "Entering your own drivers" Heres the jist of it..........

The suggested procedure for entering driver parameters is following (check first that "Auto calculate unknowns" option is checked):

1. Enter Mms and Cms

This gives fs. If either is not available, then enter fs and other parameter.

2. Enter Sd, Bl and Re

Now, you should get all but Qms (and Qts), Vas. Please note that Vas may not match exactly what is specified by manufacturer, because exact value of Vas depends on environmental parameters. See FAQ.

3. Enter Rms or Qms.

Either one will do, although I tend to prefer Qms over Rms, because it can usually be measured in driver measurement procedures.

4. Enter Hc, Hg and Pe.

If Hc or Hg or either is available, then enter Xmax and optionally either Hc or Hg if available.

5. Enter number of voicecoils.

Give it a try and Im sure we can go from there if you have any problems.

http://www.linearteam.dk/default.aspx?pageid=winisdpro
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post #12 of 27 Old 06-15-07, 10:15 PM
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Re: Changing my mind - now want to build TC2000 LLT

Thanks, downloaded it and installed.

I tried entering the parameters you suggested and could not find the following for the TC-2000:

Sd
Re
Rms
Hc
Hg
Pe

The program would not run because I did not have enough information. Anyone know what those values are?

Thanks
post #13 of 27 Old 06-15-07, 10:28 PM
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Re: Changing my mind - now want to build TC2000 LLT

ive always entered res for re, put that in and you should have enough. Also make sure you have autocalculate unknowns checked
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post #14 of 27 Old 06-16-07, 08:48 AM
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Re: Changing my mind - now want to build TC2000 LLT

I am still getting a parameter error list box popping up. I seem to still be missing info.
post #15 of 27 Old 06-16-07, 09:01 AM
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Re: Changing my mind - now want to build TC2000 LLT

OK, got the TC2000 driver saved. When I try to open new project, an error window opens and says: "floating point division by zero" I don't get it. I think I am following the directions.
post #16 of 27 Old 06-16-07, 09:13 AM
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Re: Changing my mind - now want to build TC2000 LLT

Yeah, entering driver data into WinISD is cumbersome.

For the single coil 4 ohm driver, enter in order as I've listed below, the green values shown in the pic below, and use TAB after each entry to produce auto values (which are in blue).

Make sure the units are correct - click to select units if needed.

Mms, Cms, Re(s), BL, Qms, Xmax, Vas, Le, fLe @1000, I believe Xlim is 41mm for this driver

Save...........


Changing my mind - now want to build TC2000 LLT-tc-sounds.jpg

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post #17 of 27 Old 06-16-07, 10:36 AM
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Re: Changing my mind - now want to build TC2000 LLT

Thanks, this might help but.....

My TC2000s are dual 4ohm VCs. They will be wired to 2 ohms per cabinet. 2 cabinets at 4 ohms mono to the amp.
post #18 of 27 Old 06-16-07, 10:52 AM
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Re: Changing my mind - now want to build TC2000 LLT

Quote:
My TC2000s are dual 4ohm VCs.
Then change Re to 1.595 ohms and BL to 12.40474, and voice coils to 2 in parallel.....

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post #19 of 27 Old 06-16-07, 11:43 AM
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Re: Changing my mind - now want to build TC2000 LLT

Matt,

I think you should follow 14 Hz tune, and you won't regret it

Last edited by Blaser; 06-16-07 at 11:53 AM.
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post #20 of 27 Old 06-16-07, 03:03 PM
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Re: Changing my mind - now want to build TC2000 LLT

If you are planning on building two, I see no reason not to go for the lower tune. 320 effective liters per enclosure is what I would shoot for, with tuning ~14-15hz. Some have had success in finding 6.5" or even 7" diameter sonotube at hardware stores - I'd make an effort to see if you can find some. If not, 6" diameter will work fine.


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