Can someone explain....

Discussion in 'Community Discussion' started by yg17, Sep 6, 2006.

  1. yg17 macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #1
    This has always puzzled me.....why is it on some stereo receivers, turning the volume up lowers the dB level displayed? Like, very quiet on my receiver is 70 dB where pretty loud is 30 dB. Shouldn't it be the other way around?

    Just a random question.....
     
  2. WildCowboy Administrator/Editor

    WildCowboy

    Staff Member

    Joined:
    Jan 20, 2005
    #2
    If you look closely, you'll see that they're negative numbers. They're just in relation to some reference level, which is like a direct connection to the amp. Attenuating the signal makes it quieter and sends the "volume" into "negative" territory.
     
  3. Zwhaler macrumors 603

    Zwhaler

    Joined:
    Jun 10, 2006
    #3
    I know doesn't that bother you? I seriously can't see the reasoning behind it. And whats with the whole -80db is silent, but 0db is loud as hell? I can't stand that. Someone please answer :)

    Edit: cowboy answered my ? but i typed this b4 he posted :D
     
  4. kretzy macrumors 604

    kretzy

    Joined:
    Sep 11, 2004
    Location:
    Canberra, Australia
    #4
    Yeah, I've always wondered the same thing myself. Thanks for the explanation WildCowboy. :)

    MR is so educational. :D
     
  5. yg17 thread starter macrumors G5

    yg17

    Joined:
    Aug 1, 2004
    Location:
    St. Louis, MO
    #5

    Oh, lol, never noticed the negative sign. Still doesn't make much sense to me, but now I know that it's actually -30 dB which is louder than -70 :D
     
  6. spicyapple macrumors 68000

    spicyapple

    Joined:
    Jul 20, 2006
    #6
    Sometimes I wonder why the volume knobs aren't labeled from 0-11 with 11 being the loudest. :)

    These minus dB numbers do make the receivers look sophisticated, because I can't figure it out too.
     
  7. balamw Moderator

    balamw

    Staff Member

    Joined:
    Aug 16, 2005
    Location:
    New England
    #7
    It can get really confusing when you talk about attenuation in dB, since that is typically quoted as a positive number in dB, since you are expected to be subtracting that from your reference level. The greater the number then smaller the signal that gets through. However, the same number can be quoted as gain and would then be negative.

    B
     

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