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Multi-Way Conventional loudspeakers with crossovers

Beyma 15XA38Nd network
Beyma 15XA38Nd network
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Old 1st March 2018, 01:21 PM   #1
hifisucks is offline hifisucks  Germany
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Default Beyma 15XA38Nd network

Hello, I am planning to build my last speakers :-) hahaha
Does someone know the crossover design for this coax?
Ready built from Beyma for 60€ each...
I am building a Tannoy-GRF-R like enclosure...
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Old 1st March 2018, 04:08 PM   #2
Lojzek is offline Lojzek  Croatia
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Hi, a project as grand as this one deserves proper measurements, then simulating, don't you think so?
What is the name of the Beyma filter you had in mind? Aren't these simple calculator based only?

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Old 2nd March 2018, 08:25 AM   #3
hifisucks is offline hifisucks  Germany
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Thanks! I GOT IT!
Click the image to open in full size.
Click the image to open in full size.

Last edited by hifisucks; 2nd March 2018 at 08:30 AM.
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Old 2nd March 2018, 12:35 PM   #4
Lojzek is offline Lojzek  Croatia
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A natural course of action is like this, find a measuring program to produce impedance (TSP) and FR plots. Then base your enclosure tuning in accordance with measured TSP. Afterwards, build the enclosure as if it were a final iteration, then put the unit and measure again impedance and FR. These files would have all the information needed to feed the crossover simulator and then approach to designing a filter. Is this something you can visualize yourself doing? It is not hard, really.
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Old 2nd March 2018, 03:02 PM   #5
hifisucks is offline hifisucks  Germany
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Hi Lojzek, I am not capable of measuring and tuning... except maybe with my ears :-)
But I love to work with transducers... made some experiances with fullrange... there you dont need crossovers :-)
Here is a scetch of my idea... ca. 1000mm high, 500mm wide and 460 deep
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Old 2nd March 2018, 08:40 PM   #6
Lojzek is offline Lojzek  Croatia
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Could be someone else will chime in and help you with this project of yours. I am kind of swamped right now.
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Old 3rd March 2018, 07:50 AM   #7
hifisucks is offline hifisucks  Germany
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Hi, Anyone thoughts about my design of enclosure and crossover?
I think this will do it... :-)
I do have a question about the crossover.
Should the tweeter attentuator resistor be up front or behind the zobel?

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Old 3rd March 2018, 08:06 AM   #8
nesha is offline nesha  Serbia
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Try ro simulate your design in Hornresp...
Hornresp
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Old 3rd March 2018, 08:23 AM   #9
hifisucks is offline hifisucks  Germany
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I have a mac...
Program wont work on my mac...
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Old 3rd March 2018, 08:30 AM   #10
hifisucks is offline hifisucks  Germany
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Found this mh-audio.nl - Calculations
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