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x-over filters measured with Smaart7 @ the processor outputs
x-over filters measured with Smaart7 @ the processor outputs
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Old 2nd February 2015, 12:20 PM   #1
Timo Beckman is offline Timo Beckman  Netherlands
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Default x-over filters measured with Smaart7 @ the processor outputs

I made some screen recordings where i measure different x-over slopes and combinations @ the processor outputs.
Processor outputs were summed via a small mixer.

https://timobeckmangeluid.wordpress....-speaker-used/

https://timobeckmangeluid.wordpress....s-filter-1khz/

https://timobeckmangeluid.wordpress....s-filter-1khz/

https://timobeckmangeluid.wordpress....z-combination/

Last edited by Timo Beckman; 2nd February 2015 at 06:24 PM.
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Old 25th December 2015, 04:46 PM   #2
Timo Beckman is offline Timo Beckman  Netherlands
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a "new" combination
https://timobeckmangeluid.wordpress....other-of-nm-2/

enjoy
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Old 9th January 2016, 09:55 AM   #3
Timo Beckman is offline Timo Beckman  Netherlands
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Here's another one:

First LR4 HP LP @1kHz and then LIR HP LP filters summed after the processor outputs and then the same thing @125Hz.

Processor brand is a Linea Research ASC48

https://timobeckmangeluid.wordpress....esearch-asc48/
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Old 12th October 2016, 09:16 PM   #4
Timo Beckman is offline Timo Beckman  Netherlands
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I did a couple more screen captures

Enjoy

https://timobeckmangeluid.wordpress....12/cool-stuff/

https://timobeckmangeluid.wordpress....ers-and-stuff/
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Old 17th October 2016, 04:35 PM   #5
Timo Beckman is offline Timo Beckman  Netherlands
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So here’s another screen capture. Upper part is the onax mic lower part is the ofax vertical mic. The ofax vertical is at the +/- -6db point of the horn.

https://timobeckmangeluid.wordpress....ol-stuff-nm-2/
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Old 24th October 2016, 04:47 PM   #6
Timo Beckman is offline Timo Beckman  Netherlands
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A short explanation on how i look at things when working on a drivers phase respons.
https://timobeckmangeluid.wordpress....e-upon-a-time/
Enjoy
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Old 20th November 2016, 12:25 PM   #7
Timo Beckman is offline Timo Beckman  Netherlands
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And my first steps on working with FIR:

https://timobeckmangeluid.wordpress....little-update/
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Old 1st January 2017, 09:59 AM   #8
Timo Beckman is offline Timo Beckman  Netherlands
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and another blog post on FIR:

https://timobeckmangeluid.wordpress....going-extreme/
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Old 19th January 2017, 03:13 PM   #9
newbieForever is offline newbieForever  Italy
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Quote:
Originally Posted by Timo Beckman View Post
Here's another one:

First LR4 HP LP @1kHz and then LIR HP LP filters summed after the processor outputs and then the same thing @125Hz.

Processor brand is a Linea Research ASC48

https://timobeckmangeluid.wordpress....esearch-asc48/
Timo, thank for your examples.

I'm in search of a high quality digital crossover / eq unit to use at my home with my diy loudspeakers system.
  • Can you please share your opinion on Line Research ASC-48?
  • Is the LIR crossover implementation better sounding than a Linkwitz-Riley or other FIR crossover of the same order?
  • Is optimized only for few angle or remain coherent through a wide spot?

Regards,
Roland
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Old 19th January 2017, 09:18 PM   #10
Timo Beckman is offline Timo Beckman  Netherlands
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Quote:
Originally Posted by newbieForever View Post
Timo, thank for your examples.

I'm in search of a high quality digital crossover / eq unit to use at my home with my diy loudspeakers system.
  • Can you please share your opinion on Line Research ASC-48?

    It's a really nice unit but the x-over output is phase flat but most drivers are not so you still need to correct the phase from the driver itself especially in the x-over area (a high driver will show a phase angle downward before settling horizontally).

  • Is the LIR crossover implementation better sounding than a Linkwitz-Riley or other FIR crossover of the same order?

    Our ears are not to sensitive to phase so a phase aligned system will sound ok what ever kind of x-over is used. That being said: i experience less listening fatigue working o phase flat systems.
    There are 2 more things noticeable on phase flat systems (for me and from hear speak from other technicians): the voice of the artist is more "in your face" and easier to get in to the mix.

    From a measurement point of view: on a phase flat system harmonics arrive at the same time as the fundamental where using a LR4 4th order high and lowpass x-over combination let's say at 125Hz causes harmonics on a 80Hz sine wave for example to lead compared to the fundamental since the group delay caused by that x-over combination delay's everything below that frequency.


  • Is optimized only for few angle or remain coherent through a wide spot?
This is a question (?) because if it is i do not get it sorry i'm dutch so every now and then i get lost in translation

Regards,
Roland
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