Alpair 7 used for Keele CBT Array - diyAudio
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Old 2nd June 2012, 10:03 PM   #1
HiroPro is offline HiroPro  Canada
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Default Markaudio coaxials used for Don Keele CBT Array ?

I'm curious what opinions are for using the Alpair 7, 6 metal or paper models with a Keele CBT array?

I was considering the PE kit but these drivers have me interested in DIY plans.

The paper models would be very economical for this purpose.

Opinions?

If you haven't heard of this type of line array please checkout the following links.

Don Keele's CBT (Constant Beamwidth Transducer) Page

Audio Artistry / CBT Products

Don's keynote for PE kit.

Parts Express Part 1 - Don Keele's Keynote Speech on CBT Line Array Speakers - YouTube

These drivers seems like a NATURAL to me considering they are one of a HANDFUL of affordable coaxial fullrange drivers that produce decent SQ. Especially the paper models.

Here is the CBT MOTHER LOAD

http://www.xlrtechs.com/dbkeele.com/...0Download.html

Don has a CD just full of design ideas and technical info!

Isn't the 6P or CHP a natural for this at $50 or under a driver!

Last edited by HiroPro; 2nd June 2012 at 11:04 PM.
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Old 2nd June 2012, 10:20 PM   #2
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Interesting thought. I have a feeling that if it were possible...the box would be huge. I dont think the CBT's are ported?
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Old 2nd June 2012, 11:35 PM   #3
HiroPro is offline HiroPro  Canada
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Interesting thought. I have a feeling that if it were possible...the box would be huge. I dont think the CBT's are ported?
Yeah I guess looking at the specs the cheaper 6p would be better. I hear mention of a driver called the EL70 that I can't see on Markaudio's website.
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Old 2nd June 2012, 11:50 PM   #4
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I hear mention of a driver called the EL70 that I can't see on Markaudio's website.
That's because they were built for Bob @ CSS:

Creative Sound Solutions - Loudspeakers, Parts and DIY Speaker Kits

jeff
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Old 3rd June 2012, 12:26 AM   #5
HiroPro is offline HiroPro  Canada
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That's because they were built for Bob @ CSS:

Creative Sound Solutions - Loudspeakers, Parts and DIY Speaker Kits

jeff
WOW your the third BCer I've encountered online today!

And in Vic to boot!

Is there a DIY group/GtG/society in the Victoria area?

Curious what you think of Mark's drivers for a CBT.
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Old 3rd June 2012, 12:36 AM   #6
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Is there a DIY group/GtG/society in the Victoria area?
Big time! 9th Annual Vancouver Island diyFEST 2012

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Curious what you think of Mark's drivers for a CBT.
Not a clue.

jeff
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Old 3rd June 2012, 08:06 AM   #7
HiroPro is offline HiroPro  Canada
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Originally Posted by vinylkid58 View Post
Big time! 9th Annual Vancouver Island diyFEST 2012



Not a clue.

jeff
I didn't look at the Vas for the drivers... LOL

Yeah it would have to be one huge box!

I'm just a kit builder so I'm rather clueless on box design and even most speaker parameters. I guess the suspension is "loose" on those drivers ehh?

I'm also curious why I've never seen a ML-TL With multiple drivers...

Again I'm clueless on speaker design other than following premade designs and building them.

Is a CBT possible with a ML-TL using the main drivers?

I guess low Qts (Qms?) and low Vas would be important?
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