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Multi-Way Conventional loudspeakers with crossovers

My first two way (Markaudio+Dayton)
My first two way (Markaudio+Dayton)
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Old 23rd June 2018, 10:26 PM   #21
peroz is offline peroz  Slovenia
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Jerms, thanks for the link. I will read it before making the final plans, but from the first few posts, it seems there are only minor differences between choosing one method or the other.

I played with Xsim a little, trying to figure out basic crossovers, and I just found out, I don't have enough info for the Markaudio drivers. I then opened up excel and inserted some values that I read from the official frequency response chart. Has anyone got any good FRD's and ZMA's of these speakers?
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Old 24th June 2018, 10:05 PM   #22
peroz is offline peroz  Slovenia
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Hi, how would this be for a crossover? I only put one capacitor as hpf, just to limit excursion of the fr driver. The lpf, however, is 2nd order.



This crossover is totally imaginary, I don't even know if these values exist nor if they are any good, but the response looks flat enough. I would appreciate opinions.
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Old 24th June 2018, 10:47 PM   #23
perceval is offline perceval  Taiwan
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Is that -15dB chasm between 5k to 10k measured from your driver? Yikes!

It's always better to use frd and zma files from your own setup/enclosure.
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Old 24th June 2018, 11:13 PM   #24
peroz is offline peroz  Slovenia
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Might be my clumsy manual frd creation, but the drivers are also choppy from 10k on.


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Old 24th June 2018, 11:36 PM   #25
peroz is offline peroz  Slovenia
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Something must have been wrong with my baffle step FRD file, because the big dip appeared after applying it.

I tried another export option in Edge, and the frequency response now looks a lot nicer.
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Old 25th June 2018, 03:26 AM   #26
perceval is offline perceval  Taiwan
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Trouble is, you are designing a XO not meant for your enclosure and room environment.

There's no zma output from that graph, so, the XO will be flawed as well..
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Old 25th June 2018, 06:35 AM   #27
peroz is offline peroz  Slovenia
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Quote:
Originally Posted by perceval View Post
Trouble is, you are designing a XO not meant for your enclosure and room environment.

There's no zma output from that graph, so, the XO will be flawed as well..

This is just a theoretical xo. An exercise since I never built anything like this is my life. When drivers are in te enclosure, I will measure their frequency response again and work from there. I have no means of measuring impedance, though :S
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Old 11th October 2018, 01:33 PM   #28
peroz is offline peroz  Slovenia
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The project is slooowly moving forward, and I'm at the MDF choices... Would 25 vs 28mm thickness make much difference? The enclosures will be massive and very heavy with both of them anyway...
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Old 11th October 2018, 08:54 PM   #29
planet10 is offline planet10  Canada
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I’d use 18mm quality plywood over 25mm MDF. It will be lighter & more rigid.

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Old 12th October 2018, 01:37 PM   #30
peroz is offline peroz  Slovenia
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Really? Because I read once that the absolute best material for speakers would be a combination of mdf and particle board, so If I doubled on the thickness of the mdf... the thing should be pretty darn solid, right.
Or I could make my cabine maker sweat a little and actually make a MDF+OSB sandwich
Any amp recomendations for a speaker like this?


LM1875 or LM3886 or some class D?
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