Alpair 12PW/Viawave build - diyAudio
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Old 29th November 2015, 04:22 PM   #1
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Default Alpair 12PW/Viawave build

Started this build over the weekend, a bit rough and ready. Building the crossover atm
ImageUploadedByTapatalk1448813979.984388.jpg

Being similar to the full range 12P I thought the 12PW with its shallow cone cd be ok crossed around 3khz to the viawave(inspite of being a 7" driver).
The crossover is 1st on the woofers and 2nd on the tweeters with an l pad. I'm sure the values are not really correct but will build and measure etc
ImageUploadedByTapatalk1448813938.781454.jpg

The cab design is a very simple tapered TL with a line length of 175cm, will start cutting the sections out tonight.

If anyone want to critique the crappy crossover schematic, pls do..
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Old 29th November 2015, 05:30 PM   #2
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ImageUploadedByTapatalk1448818233.592914.jpg
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Old 6th December 2015, 01:52 AM   #3
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How is it coming along? Planning on doing something similar..

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Old 6th December 2015, 10:47 AM   #4
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Default Alpair 12PW/Viawave build

Slowly but surely. Out of the cabs the sound of the two drivers together is promising. Very smooth and detailed. I need to reduce the attenuation on the Viawave by about 1-1.5db and the coil on the Alpair is rolling off too early I think.
The cabs are mostly cut, I'll post some more pics in a couple of days.

If you are planning something similar I'd def recommend the Alpair, as it's probably the only driver of its size that can be crossed this high up and work well. Another ribbon tweet that I thought of using is the fountek X2.0. But these viawaves are a bit special.

Last edited by Bill poster; 6th December 2015 at 10:53 AM.
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Old 6th December 2015, 03:52 PM   #5
zman01 is offline zman01  Bangladesh
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Hi Bill,

Good to know that initial impressions are positive.

How high are you crossing the Viawave ribbons?
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Old 6th December 2015, 03:55 PM   #6
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3khz
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Old 6th December 2015, 04:13 PM   #7
zman01 is offline zman01  Bangladesh
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Ok, 3 Khz as per your original plan.

Bring Žem on with the cabs...
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Old 6th December 2015, 07:13 PM   #8
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Confess the X/O is not properly sim'd so a lot of guesswork.
Cabs, was hard to decide between mltl, TL or a DCR.
I went for a TL as it looked like the easier option, assembly wise
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Old 6th December 2015, 09:38 PM   #9
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Quote:
Originally Posted by Bill poster View Post
probably the only driver of its size that can be crossed this high up and work well. Another ribbon tweet...
I have 4 A12pWeN & a set of CSS RT1 ribbons looking for a project -- i was thinking of mating together.

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Old 6th December 2015, 09:45 PM   #10
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the X/O
I'll get Scott to do something and was also thinking of trying the same topology as in this thot experiment:

Click the image to open in full size.

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