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Old 30th January 2012, 05:25 PM   #1461
NEO Dan is offline NEO Dan  United States
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Hey Josh,
That looks nice, is that WT Pro or WT2 software?
Assuming it's WT Pro, are you generating these from stepped power measurements?
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Old 30th January 2012, 10:28 PM   #1462
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Hey Dan.

It's just the WT2. I'm thinking about moving to the Pro but it only goes up to 40v 5A capability. Currently I'm using a LinearX V/I box run into REW form up to 100v/25A for high power impedance stuff. It's sort of a cludgy set-up though and takes a while to set-up and calibrate.
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Old 31st January 2012, 06:50 AM   #1463
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Quote:
Originally Posted by Josh Ricci View Post
Have you given any thought towards allowing the ability for complex inductance effects to be included into HR modeling?
Hi Josh,

Some time ago I looked at the possibility of allowing for lossy inductors, but decided that it would probably just complicate things unnecessarily.

How is complex inductance specified on the data sheets supplied by the driver manufacturers?

Sometimes it can be quite difficult just finding a value for the standard Le parameter as required by Hornresp :-).

Kind regards,

David
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Old 1st February 2012, 04:25 AM   #1464
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Quote:
Originally Posted by David McBean View Post
Hi Josh,

Some time ago I looked at the possibility of allowing for lossy inductors, but decided that it would probably just complicate things unnecessarily.

How is complex inductance specified on the data sheets supplied by the driver manufacturers?

Sometimes it can be quite difficult just finding a value for the standard Le parameter as required by Hornresp :-).

Kind regards,

David
Most manufacturers will not provide this info. The problem is that many bass drivers cannot be accurately modeled without complex inductance as it can affects response shape, sensitivity, efficiency and cone excursion. If you do happen to measure or get provided the information few of the widely used simulation softwares can make use of it.

I wondered if you had looked into adding it. I can understand the reluctance to bother with it when the amount of data available to take advantage of it is scant. Just throwing it out there as a possible future upgrade in capability. Thanks for your all your efforts.

Last edited by Josh Ricci; 1st February 2012 at 04:27 AM.
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Old 17th February 2012, 02:13 AM   #1465
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Hey guys!

I was wondering if I could get some guidance. I have a pair of DIY TP-1 corner horns using Lowther DX4 drivers. I want to add stereo subs to these for a bit of punch. The TP-1 seem to start rolling off at about 40Hz? I'd like to do a TH design that I could fit between one side and the wall, which would restrict the dimensions to 1024mm high and 566mm deep. Width is is up in the air, but I think I'd like to try a 8" or less driver.

So, first question. What driver? Second, any existing design that you might recommend?
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Old 17th February 2012, 10:54 AM   #1466
AndrewT is offline AndrewT  Scotland
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I suspect your Lowther horns start rolling off a lot higher than 40Hz.

I also suspect that there is no 8" made that can match the sensitivity of the horn in the octave below it.
A pair of 10" may have sufficient cone area to get up near the Lowther's output.
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Old 17th February 2012, 02:03 PM   #1467
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Thanks Andrew. As for sensitivity, I see no shame in matching things via active or passive crossover, as if the pair of speakers were to be considered a single multiway speaker.
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Old 17th February 2012, 02:22 PM   #1468
tb46 is offline tb46  United States
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Hi luvdunhill,

Don't you think this project deserves its own thread?

Regards,
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Old 17th February 2012, 03:01 PM   #1469
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Sure, sorry.
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Old 17th February 2012, 03:09 PM   #1470
tb46 is offline tb46  United States
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Hi,

No reason to say sorry, it's just too interesting a subject to get lost in this thread.

Maybe a moderator can start a new thread for you, e.g.: "Extension Subwoofer for Lowther TP1".

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