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Old 24th January 2008, 03:15 PM   #161
GM is offline GM  United States
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Interesting, I just assumed it was the same as the Contrabass.
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Old 24th January 2008, 08:03 PM   #162
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"does the motor rotate continuously in only one direction, "

How could that possibly work?
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Old 26th January 2008, 04:34 PM   #163
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Default oops

So maybe the motor shaft turns back and forth. anyway, thanks again for the pictures djk.
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Old 26th January 2008, 05:06 PM   #164
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The audio signal is fed directly to the servo motor,which turns back and forth depending on polarity,driving the cones via the belts.

Page 2 of this link shows a diagram of how it works.

http://www.servodrive.com/Download_f...ContraBass.pdf
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Old 26th January 2008, 05:57 PM   #165
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"Interesting, I just assumed it was the same as the Contrabass."

It is, just the nomenclature is different. In the blurb on the Contrabass since it is a vented direct radiator system the vent substitutes are 18" passive radiators and the 15" passive radiators driven by the S shaped belt are called 'the active radiators'.
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Old 26th January 2008, 09:36 PM   #166
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Hmm, I guess I can't 'see the forest for the trees' because I'm looking at an assembled CB belt drive system and I wouldn't describe the belt drive as 'S' shaped or the stabilizer belt system as idler pulleys.

Oh well, it's academic since Don's posted something with a drawing of it. Thanks for clarifying the BT7 uses the same system if not the same parts.

GM
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Old 30th January 2008, 02:25 PM   #167
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Default BT7

any additional info with the BT7? How about the internal and external dimensions of the box? Does anyone have this info?
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Old 30th January 2008, 08:21 PM   #168
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Look at the Lab 12 sub, very close to what you want, and something you can actually build.
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Old 12th February 2008, 01:54 PM   #169
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Default DTS20 -- the actual design...

...from the patent (page 25)

It is tri-fold -- appox 205"

The driver "taps in" at the beginning of the horn (0% offset)

The driver "taps out" 20% from the undersized mouth
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Old 7th November 2008, 02:19 PM   #170
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Default Re: DTS20 -- the actual design...

Quote:
Originally posted by qi
...from the patent (page 25)

It is tri-fold -- appox 205"

The driver "taps in" at the beginning of the horn (0% offset)

The driver "taps out" 20% from the undersized mouth

Can you send the Link of this patent page...
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