A new way to measure sub performance, $ per DB.

Discussion in 'Speakers' started by EdNichols, Mar 19, 2004.

  1. EdNichols

    EdNichols Second Unit

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    I saw this article mentioned in another thread where Sound and Vision Mag. was testing subs and one of the measuring criteria was $ per DB. Reminds me of when I go to the grocery store and compare two different sized packages of the same item to see which is cheaper. What is the $ per DB of your sub?

    http://www.soundandvisionmag.com/art...ber=1&preview=
     
  2. CarlosM

    CarlosM Stunt Coordinator

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    HSU? SVS? how could they be left out? There has to be a good reason...
     
  3. John Tami

    John Tami Stunt Coordinator

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    Add in at what distortion level too....
     
  4. CurtisSC

    CurtisSC Screenwriter

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    I think Tom Nousaine uses 10% distortion.
     
  5. Edward J M

    Edward J M Cinematographer

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    This concept is fundamentally flawed, really. Currency is in linear units of dollars, and the dB scale is log10.

    The dB scale cannot be arithmetically manipulated like the $$ scale can.

    Sub A costs $500 and does 100 dB @ 10% THD @ 20 Hz.

    Sub B costs $600 and does 106 dB @ 10% THD @ 20 Hz.

    Sub B has literally 2X the performance of Sub A for only a 20% increase in price. That cannot possibly be accurately reflected using the $/dB scale method.

    The only way to do it properly would be to convert the dB rating to some linear value with manageable units, and then do the math.
     
  6. Robert Cowan

    Robert Cowan Supporting Actor

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    Edward, i was just going to point that out. what a STUPID test...
     
  7. Marvin E

    Marvin E Stunt Coordinator

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    Just like Carlos, I didn't understand why S & V didn't mention SVS, HSU...also, if you look at the some of the subs that were highly rated based on the dollar/db criteria, I feel sorry for anyone who bought a sub on the Internet based on the S & V article.
     
  8. Tom Vodhanel

    Tom Vodhanel Cinematographer

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    Remember Nousaine already measures NF(nearfield) response, in room response, and maximum clean output at 16,20,25,31,40,50,63,80hz among other checks. I believe if it were up to him(TN)...he'd give you PAGES of very cool data/charts for every subwoofer he reveiws. But when they tell him to provide us with all the data you want...just make it fit into a 3x2" space on the page...sometimes you have to try to figure out a way to best condense a page of date into a couple of sentences...and also be sure joe 6-pack will understand it..[​IMG]


    Tom V.
    SVS
     
  9. Tom Vodhanel

    Tom Vodhanel Cinematographer

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    Also,

    Sound and Vision published reviews on products they feel their readers want to learn more about. If every member of HTF sent them a letter asking for a review of a SVS subwoofer...we'd probably have a chance. The magazines are also in a tough spot sometimes. I mean, they are a business. And as a business, who are they going to look to for a new product first...the company running 3 full page ads in every issue, or the internet direct company that has a small 2x3" ad near the back?

    SVS is VERY thankful that John Kotches and WSR offered to review a SVS product in 2003. We are still trying to convince some of the other magazines..[​IMG]


    Tom V.
    SVS
     
  10. steve nn

    steve nn Cinematographer

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    Tom V if you happen to come back to this Thread could you explain why you don't advertise in S&V mag? Is it to many $$'s to justify in your mind? Also is it to many dollars to have Tom N. review the PB2-PLUS or other SVS offerings? It gets a little frustrating posting the list and only having your first offering included. Your product is so good so what gives?? The answer could be a given but I have always wondered/wanted it clarified.[​IMG]
     
  11. Tom Vodhanel

    Tom Vodhanel Cinematographer

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    We do have a small ad near the back of the magazine.

    Sound and Vision tells TN which products are going to be in the magazine that month...so he doesn't really have much say in that aspect. He just measures/reviews what they send him..[​IMG]

    Tom V.
    SVS
     
  12. steve nn

    steve nn Cinematographer

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    Thanks Tom. My thinking is correct then.

    When you move into another bigger building yet> Then maybe, possibly, you will be ready to do so. O>> And hire twenty more skilled workers for production here in the states.
    [​IMG]
     
  13. Tom Vodhanel

    Tom Vodhanel Cinematographer

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    >>>Thanks Tom. My thinking is correct then.

    When you move into another bigger building yet> Then maybe, possibly, you will be ready to do so. O>> And hire twenty more skilled workers for production here in the states.
     
  14. steve nn

    steve nn Cinematographer

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    I'd say 9 out of 10 times, our backorder status is because our component vendors cannot keep up with our demands now. Solving that is right at the top of our priority list...

    Tom V.
    SVS
    __________________________________________________ _________



    Yes that seems to be a constant you have been always able to count on Tom. I'm sure your suppliers had no idea just how successful SVS would be and they are going through some growing pains them self's ramping production up with a little steady but kind pressure.

    It might be a good idea to go ahead and plant a tree farm for future wood needs also[​IMG] ya just never know
     

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