Sony SA-WM40 Subwoofer (Polyfil Modification)

Discussion in 'Archived Threads 2001-2004' started by MartinV, Jul 28, 2002.

  1. MartinV

    MartinV Stunt Coordinator

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    I'm considering the purchase of 2 Sony SA-WM40
    subwoofers for my home theater. I've been reading a
    lot about the modifications that are recommended for
    the SAWM40. The one that seems like a good first step
    is filling up the cabinet with Poly-fil.
    For those that have done this modification, please answer the following:
    1) Should I purchase Poly-fil brand or does it matter?
    2) Is there a specific kind I need (i.e. loose pieces,
    solid layers, etc.)
    3) I went to the following website:
    http://www.poly-fil.com/consumer/cpr...emid=fiberfill
    Out of the ones listed here, which should I go with?
    4) Is there a better website (product page) that has
    the best one to use?
    5) Should the inside walls of the sub be sprayed with adhesive before stuffing?
    6) Outside of the polyfill mod, should I replace the
    woofer with a better one (If so, is there a certain one that is best for this sub)?
    As you can tell by my level of questioning, I really
    want to make sure I get it right the first time.
    Thanks in advance.
    Feel free to email your response to me directly...
    [email protected]
     
  2. Fong

    Fong Stunt Coordinator

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    well i just stapled the polyfil in there. i dont think the brand matters, but i did get Poly-fil brand. about the woofer, i dont know. i've heard about people using an svs driver with good results, but that costs money [​IMG]
     
  3. MartinV

    MartinV Stunt Coordinator

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    Is polyfil anti-flammable? Can the sub generate enough heat for it to catch on fire?
     
  4. Fong

    Fong Stunt Coordinator

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    hehe i dont think its flammable. mine is has been on for around 6 months (auto shut off is disabled), and i use my system nearly everyday for HT or music, and when i first got it i was doing all sorts of bass tests ^_^. if it is flammable, then i dont think it gets too hot.
     
  5. Sean Laughter

    Sean Laughter Screenwriter

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    how do you disable auto-shutoff?
     
  6. peter_anderson

    peter_anderson Stunt Coordinator

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    there is a switch next to all the other knobs.
     
  7. Sean Laughter

    Sean Laughter Screenwriter

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    haha, really? I've never even noticed, I'll check when I get back.
     
  8. Kevin C Brown

    Kevin C Brown Producer

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    I would recommend taking your money from the 2 Sony's and the mods, and just get a (better) single sub.

    Well known that integrating 2 subs into a HT is much harder than 1 due to standing wave effects. (Basically 2 point sources for low frequencies that can constructively and deconstructively interact at unpredicatble points in your room, unless you take a lot of time mapping out freq response, phase, location, placement, etc.)
     
  9. EricHaas

    EricHaas Supporting Actor

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    Yep, for the price of 2 SA-WM40's you can almost get 1 Hsu VTF-2. The 2 Sony's might give you a little more headroom (if properly positioned), but the VTF-2 will go lower and has a much cleaner, less boomy sound. If your sub budget is at or under $200 though, getting one Sony is a good option. I did the polyfil mod on mine as well BTW. Just shoved 20 ounces in there. The improvement was modest but noticeable. Worth the $7 I spent on the fill.
     

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