Avia Sub Matching

Discussion in 'Archived Threads 2001-2004' started by Jason Wolters, Jan 1, 2002.

  1. Jason Wolters

    Jason Wolters Stunt Coordinator

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    Calibrating my sub-level using the Avia disc to 75 db (actually this makes the sub at 85db) to match the left channel, leaves me wanting more, from my sub (PDR-10) when I am listening to a DVD. Anyone else experience this? I understand Avia's reasoning for not allowing an LFE calibration, but with my sub calibrated to 75db level, it seems to be lacking. My room is quite large. It is 42'x15'. I have the sub level considerably higher than the 75db that would match my front left speaker. I get nice rumble and percussion as opposed to an average.....Wooompf, when it is set to 75 db.[​IMG]
     
  2. Guy Kuo

    Guy Kuo Supporting Actor

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    The sub should be matched to the current SPL level of the center channel during the center/subwoofer test, rather than targeting 75 dB. If the center speaker reads X SPL during the calibration tone, adjust the sub to also read X SPL during the sub portion of the test tone.
     
  3. DanaA

    DanaA Screenwriter

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    As long as the sub can take it, why not turn it up, if that's your preference? It sounds to me like you'd constantly be frustrated if you didn't have it set higher. I personally have my Hsu set a bit higher for the extra little punch. Set up the system the way you like it. If a little higher volume on the sub is what does it for you, then I'd say go ahead and enjoy.
     
  4. Jason Wolters

    Jason Wolters Stunt Coordinator

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  5. Barry_R

    Barry_R Stunt Coordinator

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    Jason, I also found that part of the AVIA disc somewhat confusing. So I second your question in the first paragraph. I've also found that when adjusting the sub level down to the level of the other speakers, the sub seems to low in comparison.

    Thanks to Guy for your help.

    Barry.
     
  6. Guy Kuo

    Guy Kuo Supporting Actor

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    David worded that section for the subwoofer overendowed (people with a separate subwoofer for each channel). Most of use don't use that many subs. Since all five main channels should already match each other, you can just match against the left main speaker's SPL level.
    I said to match against the center speaker's SPL reading, but really it should be the same whether you match against left, center or right speaker.
    85 dB SPL during the AVIA test tones is actually reference. The tutorial has you aim for 75 dB on the SPL meter which is actually 10 dB below reference. This is because most people end up listening about 10 dB below reference at home and we wanted to get the newbies to that state as quick as possible. The HT enthusiast later learns to aim for 85 dB SPL to reach reference state.
    Also, look here if you haven't already http://www.svsubwoofers.com/usingavia.htm
     
  7. Jerry AZ

    Jerry AZ Stunt Coordinator

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  8. Jeremy Anderson

    Jeremy Anderson Screenwriter

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  9. Jason Wolters

    Jason Wolters Stunt Coordinator

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