Blumenstein Orca and Fostex P1000-BH measurements

Discussion in 'Speakers' started by purr1n, Jun 27, 2018.

  1. purr1n

    purr1n Finding his inner redneck

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    For subjective impressions and more information about these speakers, check out the following links:
    Measurements were taken nearfield approximately 1.5 feet away. Speakers were put up on a stool and about 2 feet from a back wall.

    Blumenstein Orca Frequency Response (1/3 and 1/9 octave smoothed)
    Blumenstein Orca Frequency Response.png
    IMG_20180623_164530.jpg

    Fostex P1000-BH Kit Frequency Response (1/3 and 1/9 octave smoothed)
    PH1000 Frequency Response.png
    IMG_20180623_164108.jpg
     
    Last edited: Jun 29, 2018
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  2. purr1n

    purr1n Finding his inner redneck

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    Orca vs P1000-BH Frequency Response
    Orca = GREEN
    P1000 = PURPLE
    Orca vs PH1000 Frequency Response.png
     
    Last edited: Jul 2, 2018
  3. purr1n

    purr1n Finding his inner redneck

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    Last edited: Jul 2, 2018
  4. purr1n

    purr1n Finding his inner redneck

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    @cskippy: I assume those are listening position measurements? Less on-axis might tame the brightness, but also make worse the last octave rolloff and highlight the 1-2kHz shout. Your measurements seem consistent with my measurements. You do get a bit of bump at 180-200Hz and 100Hz, but I assume those bass bumps are from the wall and desk. Otherwise we see shared traits from 200Hz up. The 200Hz to 1kHz area could have been filled in a bit more, that lean tonality was a deal breaker for me.

    The P1000, despite the 280Hz dip (probably caused by the interfaction between the driver and BLH), sounded much fuller and with greater air compared to the Orca. The P1000 has its own problems, the 1kHz shout; but also sounded significantly more open and less congested.
     
  5. ultrabike

    ultrabike Measurbator - Admin

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    Seems there is some good bass reinforcement from the wall relative to the measurements done outside.
     
  6. purr1n

    purr1n Finding his inner redneck

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    I was hoping the wall would reinforce the 250-900Hz region. But this already fits in with what I heard from my subjective impressions.
     
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  7. ultrabike

    ultrabike Measurbator - Admin

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    If these are running w/o cross-overs or any kind of compensation, I'm actually pretty surprised at how well the upper mids and treble are behaving.

    I know it sort of defeats the purpose of not using electronics in the chain. But some small amount of compensation (assuming the kits and the Orcas supply none), may go a long way. Then again, one could use active compensation of course (DSP/EQ), depending on setup.
     
  8. purr1n

    purr1n Finding his inner redneck

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    I'd rather put in an RLC circuit on the P1000. It's a much simpler candidate. The driver is bigger, there is more high end extension, and the sound is more lively. Also the P1000 is dirt cheap.
     
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  9. purr1n

    purr1n Finding his inner redneck

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    Building in 5-6db baffle step to mitigate the lean lower mids of the Orca is going to decrease efficiency and increase distortion too. Then there is the matter of the small spikes at 2k and 10kHz.

    I'm keeping the P1000 for experiments. Just way more potential regardless of cost.
     
  10. ultrabike

    ultrabike Measurbator - Admin

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    Yup. The P1000 is a much better package based on the results. And it costs less.

    EDIT: I think the drivers for the P1000 are like $50 a pop!
     
    Last edited: Jul 2, 2018
  11. cskippy

    cskippy Creamy warmpoo

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    These are 1m on axis left and right overlayed. Again correct with the wall and desk reinforcement. I have a room null at 125Hz so I would think that that dip wouldn't be there in a more ideal setup. My biggest issue was the suckout between 200Hz-1kHz. Otherwise these had some very cool qualities to them.
     

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