How to figure a subwoofer cab size...

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Comments

  • striderstrider Posts: 2,560
    edited October 2010
    Face wrote: »
    FYI, those drivers should be grouped closer together. Guessing by the parts count, you're using shallow slopes, which requires the drivers to be within a certain distance of each other for the best integration. For example, if the crossover frequency of the mid to woofer is 700hz, the center to center distance should be 8.5". With steep slopes(4th order+), this is less of an issue.

    Mike,

    Do you have a link to a page with more info on this or a fomula?
    Wristwatch--->Crisco
  • FaceFace Posts: 14,712
    edited October 2010
    http://www.csgnetwork.com/freqwavelengthcalc.html

    Enter frequency and click on "half wave".
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
  • JstasJstas Posts: 13,527
    edited October 2010
    Face wrote: »
    http://www.csgnetwork.com/freqwavelengthcalc.html

    Enter frequency and click on "half wave".

    OOOO!!!! Spiffy!
    You're just jealous 'cause the voices don't talk to you!
  • striderstrider Posts: 2,560
    edited October 2010
    Face wrote: »
    http://www.csgnetwork.com/freqwavelengthcalc.html

    Enter frequency and click on "half wave".

    So at 300hz XO point the drivers should be ~ 19.6" apart?
    Wristwatch--->Crisco
  • FTGVFTGV Posts: 3,530
    edited October 2010
    Wow you folks have covered a lot of ground,so much for defering to doro's simplistic non techno babble don't "over think" it approach.:D
    Jstas wrote: »

    Lastly, if you are, again, going to reference Qtc, get it straight. F3 increases for values ABOVE OR BELOW 0.707.
    Do you mean increase as in lower or higher f3?
    And Shin is correct, higher Qtc values (in the >1 range)are more likely to result in a one note "boomy" response.
    You should stop cutting and pasting from websites and talking out your butt before you hurt your brain.
    Whoa,pull that finger off the trigger and put the safety on,nothing he posted required that response.
    strider wrote: »
    Mike,

    Do you have a link to a page with more info on this or a fomula?
    For more reading google lobing in loudspeakers.Lobing is basically interference between two drivers resulting in their sound changing depending on listening axis.As Mike alluded to keeping the driver spacing close in relation to crossover frequency (and increasing the xover slope)will reduce the severity of the lobing. Aswell the two drivers will function more like a single point source instead of two separate sources.
  • FaceFace Posts: 14,712
    edited October 2010
    strider wrote: »
    So at 300hz XO point the drivers should be ~ 19.6" apart?
    That's the maximum center to center distance for good integration with shallow slopes.
    FTGV wrote: »
    For more reading google lobing in loudspeakers.Lobing is basically interference between two drivers resulting in their sound changing depending on listening axis.As Mike alluded to keeping the driver spacing close in relation to crossover frequency (and increasing the xover slope)will reduce the severity of the lobing. Aswell the two drivers will function more like a single point source instead of two separate sources.
    Thanks for elaborating Fred.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
  • lightman1lightman1 Posts: 8,596
    edited November 7
    Spam-o-licious!!!
  • rooftop59rooftop59 Posts: 3,668
    Huh?
    HT Rig:
    Yamaha RX-A1010; Parasound HCA-1000a; Arcam rDac; Mains: PSB Imagine Mini + MartinLogan Dynamo (original) sub; Center - Def Tech Procenter 1000; Heights, Center Surround - Klipsch KHC - 6 In-Ceiling; Surrounds - Monoprice in-ceiling; Sub - SVS PB10-ISD; Sony BDP-S390, FireTV gen 2

    Master Bedroom
    Marantz SR-5007; Audiosource Amp Two, Dynaudio Emit 10, NHT Super One CI, ACI Titan subwoofer, FireTV, Arcam rDac; Bryson BPD-1
  • EndersShadowEndersShadow Posts: 14,813
    rooftop59 wrote: »
    Huh?

    There was a post (since removed) above russ's about "I love making things myself. I use (insert text with external link) for all my stuffs"...

    IE a spam post :smile:
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
  • rooftop59rooftop59 Posts: 3,668
    Gotcha!
    HT Rig:
    Yamaha RX-A1010; Parasound HCA-1000a; Arcam rDac; Mains: PSB Imagine Mini + MartinLogan Dynamo (original) sub; Center - Def Tech Procenter 1000; Heights, Center Surround - Klipsch KHC - 6 In-Ceiling; Surrounds - Monoprice in-ceiling; Sub - SVS PB10-ISD; Sony BDP-S390, FireTV gen 2

    Master Bedroom
    Marantz SR-5007; Audiosource Amp Two, Dynaudio Emit 10, NHT Super One CI, ACI Titan subwoofer, FireTV, Arcam rDac; Bryson BPD-1
  • lightman1lightman1 Posts: 8,596
    Dan's got my six..... ;)
  • EndersShadowEndersShadow Posts: 14,813
    lightman1 wrote: »
    Dan's got my six pack..... ;)

    Fixed it Russ :wink:

    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
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