Played with Avia a bit today, my findings with my STF-2…

Discussion in 'Speakers & Subwoofers' started by Matt_Smi, Jan 9, 2005.

  1. Matt_Smi

    Matt_Smi Second Unit

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    I finally got Avia along with an SPL meter for Christmas, today I decided to play with it a bit, but did not do a full calibration. One reason for that is my Sony receiver sucks! It does not allow you to adjust many of the things needed in order to do a proper calibration such as sub crossover level or the loudness of individual speaker levels. But I did get to find out where my subs level should be, and it ended up being on the third hash mark (out of 7) or at 10:30, however you want to look at it. Now the funny thing here is that is where I always used to set it when watching movies, sometimes a bit hotter at 11:00, I found it pretty surprising that I had my subs level correctly set by ear, but that was good to know. I was also happy to find that the sub is pretty flat in my room, response is pretty flat from 100-60 Db’s, it does have a big dip at around 88 Hz though, then once it goes below 60 it gets considerably louder than the 100-60 Db range, but from 60-30 Hz it pretty much remains within 2 Db’s with a 4 Db slight bump in the 32-38 Hz region (which is very deep BTW). The once it goes below 30 Hz output drops off by around 4-6 Db, but was surprised to see that the sub has usable output down to 23 Hz. Anyway no real point to this thread, I am just happy that my room does not have anything crazy going on with it and now that I know how to use the meter I can experiment with a few sub placement options to see if they work better. O yeah there are a few pictures of my setup in the link below so you can see where the sub is located.

    http://gallery.avsforum.com/showgall...ppuser=7452843
     
  2. Chris Quinn

    Chris Quinn Screenwriter

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    Did you use the RS meter corrections for your numbers?

    12Hz add 16.5dB
    16Hz add 11.5dB
    20Hz add 7.5dB
    25Hz add 5dB
    31.5Hz add 3dB
    40Hz add 2.5dB
    50Hz add 1.5dB
    63Hz add 1.5dB
    80Hz add 1.5dB
    100Hz add 2dB
    125Hz add .5dB
     
  3. Matt_Smi

    Matt_Smi Second Unit

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    Nope, damn I totally forgot about that, thanks. So at 25 Hz the sub is only down by a Db or two, very cool.
     

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