Corrected sweep...how's this?

steveinaz
steveinaz Posts: 19,538
edited April 2004 in Subwoofer Hookup & Bass Management
Athena AS-F2 from listening position, corrected 18-100Hz:
Source: Bluesound Node 2i - Preamp/DAC: Benchmark DAC2 DX - Amp: Parasound Halo A21 - Speakers: MartinLogan Motion 60XTi - Shop Rig: Yamaha A-S501 Integrated - Shop Spkrs: Elac Debut 2.0 B5.2
Post edited by steveinaz on
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  • HBombToo
    HBombToo Posts: 5,256
    edited April 2004
    The spl at ~20Hz is amazing...

    After seeing the curve where do you think you will cross? I'm thinking 45 might be a little low???

    HBomb
    ***WAREMTAE***
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  • steveinaz
    steveinaz Posts: 19,538
    edited April 2004
    I'm thinking 50Hz will be my starting point, then I'll plot the system together and see how it looks...

    That 20Hz tone is pretty incredible, the cones were "swimming" in the cabinet..LOL! I was impressed with how clean the tone played thru.
    Source: Bluesound Node 2i - Preamp/DAC: Benchmark DAC2 DX - Amp: Parasound Halo A21 - Speakers: MartinLogan Motion 60XTi - Shop Rig: Yamaha A-S501 Integrated - Shop Spkrs: Elac Debut 2.0 B5.2
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  • Dr. Spec
    Dr. Spec Posts: 3,780
    edited April 2004
    Looks like a nice curve.

    I'd probably opt for about 45 Hz to start. Remember, the low pass filter on the SVS is 2nd order, and most filters are designed to already be a few dB down at the filter point.

    The Athena is also down a few dB at 45 Hz, so the two outputs will sum.

    It might be hard to get a perfect transition, but I don't think it will look bad at all; that's not a hard curve to work with at the low end.

    Also, don't be fooled by the 70 dB SPL at 20 Hz - the sound pressure only tells you half the story. Harmonic distortion is responsible for a large portion of that reading. In fact I'm sure Steve could clearly hear the 2nd order harmonic, which would be 40 Hz.

    Doc
    "What we do in life echoes in eternity"

    Ed Mullen (emullen@svsound.com)
    Director - Technology and Customer Service
    SVS
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  • HBombToo
    HBombToo Posts: 5,256
    edited April 2004
    Originally posted by Dr. Spec

    Also, don't be fooled by the 70 dB SPL at 20 Hz - the sound pressure only tells you half the story. Harmonic distortion is responsible for a large portion of that reading. In fact I'm sure Steve could clearly hear the 2nd order harmonic, which would be 40 Hz.

    Doc

    This never even occurred to me... very interesting indeed and it makes perfect sense to me now.

    HBomb
    ***WAREMTAE***
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