Calibration Question

Discussion in 'Archived Threads 2001-2004' started by John Hergenrather, Jun 5, 2002.

  1. John Hergenrather

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    I'm calibrating my new equipment using AVIA and had a question. Should I have the amp/SVS turned on when setting 85db on my small satellite speakers? There is obviously a HUGE difference in sound levels. It seemed to reach the 85db too fast with the sub turned on, but with it turned off I really had to crank it up to get to 85db. I'm just a little confused.

    Thanks
    John

    (BTW - equipment listing for this setup : )

    Eosone RSS 705 (small speakers from Arnie Nudell)
    Panasonic RP-91
    Denon 3801
    Samson S-1000
    SVS 20-39
    Mits 46807
    Monster HTS 5000
     
  2. John Hergenrather

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    I've been working on it more this evening. An example of my confusion would be the front right channel - I adjust the output level up and down (even took it to -15db) and it still registers as 86db on the SPL meter. It's all bass coming off of the SVS.

    With the sub turned on I am setting 85db with the main channel output on the Denon set to at or near 0db. When I turn off the sub, I have to take the channel outputs up to +5db or higher to get to 85db.

    Am I missing something obvious here? I realize this comes across like a complete newbie. That makes the situation even more frustrating for me!
     
  3. Vince Maskeeper

    Vince Maskeeper Producer

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    1) Make sure the weighting on the meter is correct.

    2) What is the sub set at? Have you calibrated it with tones first? The test tones have a small amount of low freq info, but it shouldn't cause a 10db difference unless the sub is waaaay overcranked or if the meter is set incorrectly.

    -Vince
     
  4. John Hergenrather

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    Thanks Vince - When I checked back, I saw that the buddy I had bought this from had cranked the bass up HUGE! I brought it down to normal levels and the tests went much smoother.

    I like rumble, but I'm really after the way it was mastered on the disc. If it wasn't intended to shake my neighbors house then I'm not trying to force it!
     
  5. Arron H

    Arron H Second Unit

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  6. Vince Maskeeper

    Vince Maskeeper Producer

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    Arron,

    Actually the filtered Pink still has a little bit of stuff in it that will roll into the sub. However, you probably never noticed because it is such a small amount that unless you have the sub output cranked wide open- you'd never hear it.

    But feel free to try it- with speakers set to small- turn your sub output all the way up and play the left channel calibration tone on AVIA-- you should get some small amount of sub output from that tone.

    -V
     
  7. Arron H

    Arron H Second Unit

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    Interesting, thanks for the clarification, Vince. [​IMG]
     
  8. Mike Kearns

    Mike Kearns Auditioning

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    Good discussion,
    I'm using the avia test disc with a digital meter. The test pattern that alternates between speaker and sub is causing some problems. Only my LF matches the sub output the rest have a 6db problem what gives.
     
  9. Vince Maskeeper

    Vince Maskeeper Producer

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    That's weird!

    What your saying is: Using the sub/main speaker alternation the sub matches up on the Left Channel- but then is 6db off for every other channel? Is this correct?

    Is the sub 6db high or low? What is your crossover point? Are all your other speakers calibrated properly? What receiver or processor? Did you try the freq sweeps- did you get a similar 6db difference?

    -Vince
     

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