If I wanted to change the tuning freq of my sub, would that damage the loudspeaker?

Discussion in 'Archived Threads 2001-2004' started by Sebastian, Sep 5, 2002.

  1. Sebastian

    Sebastian Second Unit

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    Lets say I changed my subs tuning frequency from 45-50HZ to 32 - 35 Hz. What type of results should I expect and would there be any chance of hitting Xmax?
    Basically my sub has two ports and by plugging one of them up it would change the tuning frequency to those number according to LspCAD.
    Outside dimension 15.75x14.5x15.75
    two ports, 7cm (2.75in) diameter and 15cm (6in) in length
    10" sub
    I have no actual specs on the woofer. Just the enclosure
    Any advice? Would it be worth it?
     
  2. Patrick Sun

    Patrick Sun Moderator
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    You might get more chuffing noise, but give it a shot!
     
  3. Mark Fitzsimmons

    Mark Fitzsimmons Supporting Actor

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    A lower tuning will actually lessen the chance of bottoming the sub.
     
  4. Chris Tsutsui

    Chris Tsutsui Screenwriter

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    Isn't the tuning point of an enclosure the specific frequency in which the air resonates and amplifies sound?

    So in the end you might lose a lot of 45-50hz bass by tuning the enclosure below what it was designed for. In other words... If a commercial sub was designed to produce a flat response with the help of that tuning point, then changing it could result in a sloppy freq response.
     
  5. Mark Fitzsimmons

    Mark Fitzsimmons Supporting Actor

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    Yeah, but if he's only plugging a port, its reversable. Does not hurt to experiment.
     
  6. Sebastian

    Sebastian Second Unit

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    I guess I will go for it and run a freq sweep using the my Stryke disk and RS SPL meter and see what happens.
    Thanks guys,

    Here are the pre readings with no adjustments to the tuning Freq.

    FREQ RAW SPL Corrected SPL (comp)

    16HZ----63.5---75.0
    18HZ----65-----73.0
    20HZ----73-----80.5
    22HZ----73-----79.5
    25HZ----81-----86.0
    28HZ----90-----94.0
    31.5HZ--90.5---93.5
    36HZ----88-----90.5
    40HZ----99-----101.5
    45HZ----99-----101.0
    50HZ----95-----96.5
    56HZ----100----101.5
    63HZ----102----103.5
    71HZ----97.5---99.0
    80HZ----94-----95.5
    89HZ----93-----94.5
    100HZ---92-----93.0
    111HZ---97-----98.0
    125HZ---89-----89.5
    142.5HZ-95-----95.5
    160HZ---83-----82.5
     

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