PB10 pictures and measurements

Discussion in 'Speakers' started by Ilkka R, Dec 18, 2004.

  1. Ilkka R

    Ilkka R Second Unit

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    Here you can find two galleries. Links are Finnish, but just click them. My friend owns the sub, I just made the measurements and gave my opinion about the sound. [​IMG]
    Room is very small, less than 1500cu.f. Concrete all over and that makes it sound a littlebit boomy and undetailed. He is thinking of buying BFD some day, that should help a littlebit.

    First graph is sub+mains.
    Second graph is sub only xo 100Hz.
     
  2. Yohan Pamudji

    Yohan Pamudji Second Unit

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    Wow, much bigger than I imagined it would be. Not exactly svelte, is it?
     
  3. Ilkka R

    Ilkka R Second Unit

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    Yep, it's kinda hard to lift it, because it's hard to get your hands around it. Cylinders are more easier, just one giant bearhug and off we go. The old rugtrick works best with boxes.

    Actually it looks/is even bigger in nature. But not too big. [​IMG]
     
  4. Edward J M

    Edward J M Cinematographer

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    Great pics, Ilkka.

    Looks like a big peak in the 45 Hz region - this will give the boomy sound. I agree, a PEQ would fix that right up.

    How does the sound meter being connected to the sound card and TrueRTA work out?
     
  5. Ned

    Ned Supporting Actor

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    This is about what you want vs what he has.

    [​IMG]

    A good 10-15db too much bass from 30-200hz, "boomy".
     
  6. Ilkka R

    Ilkka R Second Unit

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    It worked great. I have done measurements before with my own equipment, so it was kinda plug and play. [​IMG]

    I checked the levels in oscilloscope mode so it won't override the incoming signal. Also corrected soundcard anomalies with the ss calibration option. MCC was of course also applied. RS meter gives 0-1V output, so it's perfect for regular soundcards like Audigy etc. No mic amp needed.

    That 45Hz peak is a nasty standing wave, comes from the room's length 12ft. It can also be seen in mains FR.
     
  7. Ilkka R

    Ilkka R Second Unit

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    Ned, no, that is not what I/he wants. Draw a straight line at 70dB, that's what I want. 10dB house curve doesn't sound good. Max 5-6dB house curve but with music you don't want it.
     
  8. Ned

    Ned Supporting Actor

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    Well, your hearing sensitivity trails off as the frequency decreases so a flat response will sound weak. But, you're free to setup whatever sound you/he wants. I'm sure there is a curve named for this phenomenon [​IMG]
     
  9. Ilkka R

    Ilkka R Second Unit

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    Ned, I suggest you to read this. Not everybody likes how house curve sounds. Yes, and I know F-M curve. 3-4dB boosted (under 100Hz) flat curve does sound best for movies IMO. For music flat.
     
  10. Aaron Waters

    Aaron Waters Extra

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    that poster is a disgrace to humanity. nice sub.
     
  11. Ilkka R

    Ilkka R Second Unit

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    He is my friend's idol. I've got nothing to do with it. [​IMG]
     
  12. Axu R

    Axu R Agent

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    Yeah well, this thread is about the sub so keep it that way, please. Comments and questions about the sub are more than welcome!
     
  13. Axu R

    Axu R Agent

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    Just to remind, that I'm still very pleased with the sub. We have ~4 of these in Finland now, and they all are in heavy use, I believe. Greetings to Tom, Ron, Erik and the whole crew!
     

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