Fs advertised versus capability

Discussion in 'General Audio Discussion' started by opusarlo, Nov 2, 2017.

  1. eiraved

    eiraved AK Subscriber Subscriber

    Messages:
    2,168
    Location:
    Antelope Valley, CA
    An excerpt from this link, and auditory description of the pictured system...

    "I underestimated how much physical grip this sub system now has on the construction and everything in and around it. Trust me, I’m used to sub-buzzing and rattling of doors in doorframes, windows, ceilings and all sorts of stuff lying around.. the Labsubs on their own where more than capable of shaking the room...but this is of another proportion. The addition of the 4 HS24 twins LITERALLY take it from shaking the room to tearing it apart! the ceiling is shaking so violently.. the plasterwork and paint ruptured on some seams.. that happened in a few seconds.. actually it took not more than that 1 wormhole sequence of Interstellar.. the +100Kg steel rolling shutter on the outside is rattling so violently you can hear it above the sub rumble. 2 blocks down, all doors and windows in a 50 meter radius rattled (and not a little) that effected approx. 6 neighbors… everything, even heavier stuff in my adjacent garage and the garages of the neighbors is moving and falling down…the shock came when I came back in from checking the rattling (like crazy) of the rolling shutter and saw that the picture moved completely from the screen.. it was the power cable that kept the beamer from falling of the shelf…

    I would say at 60% capacity…in a panic I turned the system down.. and that was the point where I heard a neighbor calling. A few seconds later 4 neighbors were outside. Previously (in my Labsub era) they could laugh with it…not anymore! This is no teenage bass-bragging, it is what actually happened.. literally in one wormhole scene…"


    All I can say is...wow! He almost destroyed part of his neighborhood within a 50 meter radius with infrasonic sound. You sold me on it, I gotta make one of these!
     
    Last edited: Nov 13, 2017
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  2. nyhifihead

    nyhifihead Well-Known Member

    Messages:
    754
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    yea I was going to add that to my post. true insanity, its hard to fathom how much air multiple 24" woofers tuned below 20hz moves..
     
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  3. manu et deo

    manu et deo I'm loving it! Subscriber

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    SW Riverside County, CA
    The Diy guys at AVS will blow your mind with what some try and achieve;)
     
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  4. nyhifihead

    nyhifihead Well-Known Member

    Messages:
    754
    Location:
    long island NY
    please tell me this came to fruition man

    pm me if you need help...
     
    Last edited: Jan 31, 2018
  5. Leben

    Leben AK Subscriber Subscriber

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    Location:
    Iowa
    I enjoy organ music also. One option is to try to find some high quality organ speakers. At one point I used 4 Allen Organ HC-12 speakers (using woofers only) in part of a tri-amped system. They are designed to play a 32' stop. These were powered by an Altec pro amp and could literally shake the house if turned up very loud.
    20170305_124408.jpg
     
  6. NAD80

    NAD80 Super Member

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  7. Ds2000

    Ds2000 All About every cool stereo component. Subscriber

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    Was going to mention that Walker digital has been making digital 32’ stops for instruments for over 25 years, and are the best at it. I’d bet they have a pretty good angle on making bass cabinets if organ music is your thing.
     
  8. damacman

    damacman Blown and Injected Subscriber

    Messages:
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    Location:
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    Guys. Omg. 16Hz at 115dB in a domestic setting is not only mental, that's ludicrous. Now keep in mind that in a previous life, I worked in the car audio industry for 20 years. I drove demo vehicles with as many as (12) 15" woofers capable of 150dB SPL. I still do own a vehicle with a pair of 18" subwoofers in infinite baffle, capable of flat response to below 20Hz and semi-insane SPL at frequencies below 40Hz. So, let's just say that I have an appreciation for properly designed and executed subwoofer systems.

    I've owned two separate homes at which I integrated pairs of 18" subwoofers in the attic in coffin sized vented enclosures, big power, and equalization to flatten response to 20Hz at the listening location. Looking back, the cons far outweigh the pros. Generating such high SPL at low frequencies in a home in a neighborhood brings with it all kinds of challenges. My subwoofer systems destroyed my ex-wive's nick nacks, ripped drywall from the studs, caused light bulbs to unscrew and drop from their sockets, caused globes to fall to their demise from light fixtures, and generated hundreds of complaints from neighbors and numerous visits from law enforcement.

    Years ago, I came to the realization that the only thing on this planet capable of reproducing the tactile sensation of a full size pipe organ with 32' pipes capable of shaking the marble foundation of the largest church is said pipe organ. Sure, (8) 24" SI subs would be a hoot, but not until I buy property 100 miles from nowhere with a concrete bunker for a sound room.

    Given the advancements in subwoofer driver technology, it's just too easy to get satisfactory output to below 20Hz with a single 12" driver in a reasonably sized enclosure and modest power.
     
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  9. opusarlo

    opusarlo Active Member

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    279
    Location:
    Grand Rapids, Michigan
    OMG that system...yes please
     
  10. opusarlo

    opusarlo Active Member

    Messages:
    279
    Location:
    Grand Rapids, Michigan
    http://www.mlive.com/business/west-...rga.html?ath=403246303817d51e0941a99703d6356a
    http://www.mlive.com/business/west-...rga.html?ath=403246303817d51e0941a99703d6356a - this exists 3 miles from my house. It is interesting to see the engineering that had gone into it.
     
  11. damacman

    damacman Blown and Injected Subscriber

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    I saw that a while ago! Amazing!
     

     

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