Freq. response.

Discussion in 'Speakers' started by Jongyoon Lee, Mar 6, 2006.

  1. Jongyoon Lee

    Jongyoon Lee Stunt Coordinator

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    I found this cool measurement tool, and have been playing with it for a couple of days.

    Room EQ Wizard

    I've hooked up my Radio Shack SPL meter to the laptop, and took some measurements.

    Revel M20
    http://static.flickr.com/53/10909238...40904e.jpg?v=0

    Celestion AVP + Velodyne CHT
    http://static.flickr.com/43/10909238...742beb.jpg?v=0

    The graphs look like they are begging for some room treatment. Both graphs show pronounced bump at 100Hz, and another one near 180 - 200Hz. The upper end drops off at 8KHz. Maybe that's caused by the limitation of the soundcard. As evidenced by the graphs, the sonic signatures are pretty similar between two systems. A bit of irony as Celestions costed me about 15% of Revels.
    [​IMG]
     
  2. SethH

    SethH Cinematographer

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    I've used REW in the past -- it's very popular over at AVS . . . I'm assuming that's probably where you found it.

    What correction file did you use for the meter? There is a general correction file and then one that Ilkka produced based on a comparison between his calibrated mic and his SPL meter.
     
  3. Jongyoon Lee

    Jongyoon Lee Stunt Coordinator

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    I haven't used any correction file, other than the soundcard calibration I did on my own. I'll try the correction file. Hopefully it can smooth out some of the bumps in the graph. I'm probably using less than 10% of what this software is capable of right now. [​IMG]
     
  4. Jongyoon Lee

    Jongyoon Lee Stunt Coordinator

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