WTH is Slope Control???

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AsSiMiLaTeD
AsSiMiLaTeD Posts: 11,728
edited July 2004 in Subwoofer Hookup & Bass Management
I was looking at the back of one of the subs at Ultimate last weekend...it was the KEF 2150 and found something new to me...

There is a switch called "slope control" marked 12/24dB that is not explained. Do you have any idea what this is for?

The KEF web site gives few details.
Post edited by AsSiMiLaTeD on
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  • gatemplin
    gatemplin Posts: 1,595
    edited July 2004
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    It probably changes the crossover from 2nd order (12 dB per octave) to 4th order (24 dB per octave). It would add flexibility and could be useful depending on what speakers you use.
    Graham
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  • AsSiMiLaTeD
    AsSiMiLaTeD Posts: 11,728
    edited July 2004
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    Originally posted by gatemplin
    It probably changes the crossover from 2nd order (12 dB per octave) to 4th order (24 dB per octave). It would add flexibility and could be useful depending on what speakers you use.
    Can you expound just a bit? When you say "2nd order (12 dB per octave)"...what does that mean?
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  • Dr. Spec
    Dr. Spec Posts: 3,780
    edited July 2004
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    All filters have slopes (i.e., how quickly they ramp down the signal). Slope is measured in units of dB/octave.

    The steeper the slope, the higher the order of the filter.

    1st order = 6 dB/octave
    2nd order = 12 dB/octave

    and so forth.

    Typical low pass filters on subwoofers are 4th order, but most AVR's impose a 2nd order high pass on the mains, and there is a mismatch of slope. The ability to alter the slope of the filter to achieve parity with the corresponding high pass is a really nice feature.

    Doc
    "What we do in life echoes in eternity"

    Ed Mullen (emullen@svsound.com)
    Director - Technology and Customer Service
    SVS
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  • RuSsMaN
    RuSsMaN Posts: 17,985
    edited July 2004
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    Man, there is a friggin HILARIOUS answer to the intial question, but I can't bring myself to post it.

    Cheers,
    Russ
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • TroyD
    TroyD Posts: 13,124
    edited July 2004
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    Life is suck
    I plan for the future. - F1Nut
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  • AsSiMiLaTeD
    AsSiMiLaTeD Posts: 11,728
    edited July 2004
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    Originally posted by RuSsMaN
    Man, there is a friggin HILARIOUS answer to the intial question, but I can't bring myself to post it.

    Cheers,
    Russ
    well let's hear it then...
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  • PolkWannabie
    PolkWannabie Posts: 2,763
    edited July 2004
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    Originally posted by RuSsMaN
    Man, there is a friggin HILARIOUS answer to the intial question, but I can't bring myself to post it.

    Cheers,
    Russ
    I was thinking the same thing ... but I don't think I'll go there ...
    Rick
    HT+ Sunfire TG IV, Dual CG Sig II's, CinePro 1K2, Oppo 981, Audio Technica PL120, Polk SRT's & F/X1000's, Samsung 71" DLP
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  • Pauly
    Pauly Posts: 4,519
    edited July 2004
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    Freakin Spec...Name says it all..

    Pauly
    Life without music would♭
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