Beyma 12P80ND v2 and Faital Pro 10AK in 3 way open baffle?

snake69fast · 19th January 2021, 09:16 PM

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!

apolinary · 20th January 2021, 07:30 AM

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!

apolinary · 20th January 2021, 07:34 AM

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 :-)

snake69fast · 20th January 2021, 07:03 PM

Quote:

Originally Posted by apolinary

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!

apolinary · 21st January 2021, 01:13 AM

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.

LewinskiH01 · 21st January 2021, 02:17 AM

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!

snake69fast · 21st January 2021, 01:19 PM

Quote:

Originally Posted by apolinary

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.

snake69fast · 21st January 2021, 01:21 PM

Quote:

Originally Posted by LewinskiH01

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.

LewinskiH01 · 22nd January 2021, 01:51 AM

Quote:

Originally Posted by snake69fast

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?

Bas Horneman · 23rd January 2021, 10:09 AM

Why do you think this is not possible with compression drivers to remove the back?
Attachment 914341 Attachment 914342

19th January 2021, 09:16 PM	#1
snake69fast diyAudio Member Join Date: Jul 2013	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!

20th January 2021, 07:30 AM	#2
apolinary diyAudio Member Join Date: Aug 2015	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! __________________ Who hath ears to hear let him hear.

20th January 2021, 07:34 AM	#3
apolinary diyAudio Member Join Date: Aug 2015	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 :-) __________________ Who hath ears to hear let him hear.

21st January 2021, 01:13 AM	#5
apolinary diyAudio Member Join Date: Aug 2015	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. __________________ Who hath ears to hear let him hear.

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21st January 2021, 02:17 AM	#6
LewinskiH01 diyAudio Member Join Date: Nov 2014 Location: Buenos Aires	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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