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Beyma 12P80ND v2 and Faital Pro 10AK in 3 way open baffle?
Beyma 12P80ND v2 and Faital Pro 10AK in 3 way open baffle?
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Old 19th January 2021, 10:16 PM   #1
snake69fast is offline snake69fast  Romania
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Default Beyma 12P80ND v2 and Faital Pro 10AK in 3 way open baffle?

Hi!
I'd like to build some 3 way open baffle using Beyma 12P80ND v2 as a mid and Faital Pro 10AK compression driver for the high frequency. For the low frequency I will decide later the driver(s).
Do you think it can be a good choice? Any particular horn in mind? I am looking at Faital Pro LTH 102, looks OK.
Any ideas for a good passive crossover is highly-appreciated.
Thank you!
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Old 20th January 2021, 08:30 AM   #2
apolinary is offline apolinary  Poland
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It's gonna be hard to make a 3way open baffle unless you implement some substantial modifications regarding 10AK ;-)
Anyway, I enjoy those compression drivers for a while now. They are attached to the LTH102, crossing them at 1000Hz. Faitals 12PR300 play below...
I think Beymas are gonna be OK as well or even better, lots of happy people using them.
Good luck!
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Old 20th January 2021, 08:34 AM   #3
apolinary is offline apolinary  Poland
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One more thing: 10AK is not that flat as you can see on the faital pro website. Some work is needed there, still tuning mine :-)
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Old 20th January 2021, 08:03 PM   #4
snake69fast is offline snake69fast  Romania
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Quote:
Originally Posted by apolinary View Post
It's gonna be hard to make a 3way open baffle unless you implement some substantial modifications regarding 10AK ;-)
Anyway, I enjoy those compression drivers for a while now. They are attached to the LTH102, crossing them at 1000Hz. Faitals 12PR300 play below...
I think Beymas are gonna be OK as well or even better, lots of happy people using them.
Good luck!

What kind of substantial modifications regarding 10AK do you have in mind? Maybe another horn?

Do you use Faital Pro 12PR300 in open baffle?
Thank you!
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Old 21st January 2021, 02:13 AM   #5
apolinary is offline apolinary  Poland
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You just can't have a compression driver open... So it's gonna be a mids/bass open baffle with "closed" highs...
12PR300: I have them open now, had them closed for a while and going to try them aperiodic... sort of... I think that the latter will be the final solution.
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Old 21st January 2021, 03:17 AM   #6
LewinskiH01 is offline LewinskiH01  Argentina
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I'm learning about dipoles as well. I've been evolving my design which also started with a closed-back tweeter - a Beyma TPL-150H AMT in my case. I learned at this forum that a good starting point is to have dipole back wave up to about 6kHz for back wall reflections. That is why some designs include a back firing dome tweeter.
I did open the back of my tweeters, in fact later added a proof of concept back waveguide and have kept it. Of course this is not possible with a compression driver.

FWIW, I don't remember seeing the 12P80ND on open baffles. Try searching within the Ultimate OB thread.

cheers!
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Old 21st January 2021, 02:19 PM   #7
snake69fast is offline snake69fast  Romania
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Quote:
Originally Posted by apolinary View Post
You just can't have a compression driver open... So it's gonna be a mids/bass open baffle with "closed" highs...
12PR300: I have them open now, had them closed for a while and going to try them aperiodic... sort of... I think that the latter will be the final solution.
You are right. Mids and bass will be open and the highs on horn an cd.
I saw this approach on PAP Trio15 Horn1.
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Old 21st January 2021, 02:21 PM   #8
snake69fast is offline snake69fast  Romania
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Quote:
Originally Posted by LewinskiH01 View Post
I'm learning about dipoles as well. I've been evolving my design which also started with a closed-back tweeter - a Beyma TPL-150H AMT in my case. I learned at this forum that a good starting point is to have dipole back wave up to about 6kHz for back wall reflections. That is why some designs include a back firing dome tweeter.
I did open the back of my tweeters, in fact later added a proof of concept back waveguide and have kept it. Of course this is not possible with a compression driver.

FWIW, I don't remember seeing the 12P80ND on open baffles. Try searching within the Ultimate OB thread.

cheers!
I discovered that I like so much the sound of this Beyma in open baffle that I decided to build this project around it.
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Old 22nd January 2021, 02:51 AM   #9
LewinskiH01 is offline LewinskiH01  Argentina
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Quote:
Originally Posted by snake69fast View Post
I discovered that I like so much the sound of this Beyma in open baffle that I decided to build this project around it.
Interesting!!
What are the estimated crossover points for the 12" as midrange?
Do you have measurement capabilities and any measurements you can share?
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Old 23rd January 2021, 11:09 AM   #10
Bas Horneman is online now Bas Horneman  Netherlands
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Why do you think this is not possible with compression drivers to remove the back?
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