Question about sub SPL level

Discussion in 'Archived Threads 2001-2004' started by Kevin Cagle, Mar 4, 2002.

  1. Kevin Cagle

    Kevin Cagle Agent

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    I am new to HT tuning and recently bought the radio shack SPL meter(which BTW is on sale right now). I used the sound and vision disc to tune my system.

    What I found was that my sub was cranked WAAAYYY higher than the rest of my speakers. Like 15db higher. It didn't sound like it was that far off, though I knew it was a little high.

    Here is my question:

    When setting to reference level 75db, the meter even on C weighting/slow for my sub is still pretty spikey.

    Does the radio shack meter accurately pick up those low tones and do i really set the sub to exactly the same as the other speakers, b/c now it sounds kind of quiet OR am i just being an overindulgent bass-a-holic?

    Thanks in advance,

    Kevin
     
  2. ColinM

    ColinM Cinematographer

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    Here are the figures to add to the meter's readout -

    10Hz +20.5

    12.5Hz +16.5

    16Hz +11.5

    20Hz +7.5

    25Hz +5

    31.5Hz +3

    40Hz +2.5

    50Hz +1.5

    63Hz +1.5

    80Hz +1.5

    100Hz +2

    125Hz +0.5

    160Hz -0.5

    200Hz -0.5

    250Hz +0.5

    315Hz -0.5

    400Hz 0

    500Hz -0.5

    630Hz 0

    800Hz 0

    1KHz 0

    My pink noise levels go from 74-76db between (guessing) 40 - 80Hz, so I'm 'naturally' 1-3 db's hot.

    Pink noise is an average kinda thingy...

    Hope this helps.

    - CM
     
  3. Brian E

    Brian E Screenwriter

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  4. Kevin Cagle

    Kevin Cagle Agent

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    Talk about fast!

    Call me a dolt or whatever term you prefer to use, but if I understand correctly the meter will read ~3db too low for the sub level tone and the meter is spikey b/c it is off different amounts at different tones?
     
  5. ColinM

    ColinM Cinematographer

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    Yup.
    Meter sez 70 @ 25, it's really 75.
    Be aware that your ears act a bit like the meter...you are also not very sensitive to low bass at low volume, which is why you may hear the term 'house curve' thrown around.
    - CM
    'Swooooosh!'
    Not fast, just bored...[​IMG]
     
  6. Kevin Cagle

    Kevin Cagle Agent

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    i feel comfortable letting this fall off the forum now.

    thanks for helping a newbie...

    I'm so excited. my cc-370 comes in 4 more days! Just in time for the weekend.
     

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