Doubling the wattage only increases the sound by 3db

Discussion in 'OT Technology' started by Doc Brown, Jul 9, 2006.

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  1. Doc Brown

    Doc Brown Don't make me make you my hobby

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  2. Doc Brown

    Doc Brown Don't make me make you my hobby

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    http://72.14.203.104/search?q=cache:rrTJyk3F3PoJ:www.honda-tech.com/zerothread/897225+autosound+double+wattage+adds+3db&hl=en&gl=us&ct=clnk&cd=5



    "`dB' is for decibel, and is a measurement for power ratios. To measure dB, you must always measure with respect to something else. The formula for determining these ratios is P=10^(dB/10), which can be rewritten as dB=10log(P). For example, to gain 3dB of output compared to your current output, you must change your current power by a factor of 10^(3/10) = 10^0.3 = 2.00 (that is, double your power"



    LOL AT PEOPLE WITH "STUPID EXPERIENCE" WHO SAY OTHERWISE.
     
  3. Doc Brown

    Doc Brown Don't make me make you my hobby

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  4. Doc Brown

    Doc Brown Don't make me make you my hobby

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  5. Doc Brown

    Doc Brown Don't make me make you my hobby

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  6. Doc Brown

    Doc Brown Don't make me make you my hobby

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  7. Doc Brown

    Doc Brown Don't make me make you my hobby

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  8. Doc Brown

    Doc Brown Don't make me make you my hobby

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  9. twistid

    twistid Banged By Super Models Moderator

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    it sure is...

    Dynamat sound control materials can maximize any system’s clarity and Sound Pressure Level (SPL) potential. It is commonly said that to get a 3dB gain in SPL you must double the system's power. But, remember, that’s only a potential 3dB gain, not a sure thing. Whether you are going after maximum competition bass output, or just want to increase your current system's clarity and decibel production, Dynamat products will help you achieve your goals.
     
  10. Doc Brown

    Doc Brown Don't make me make you my hobby

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  11. twistid

    twistid Banged By Super Models Moderator

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  12. twistid

    twistid Banged By Super Models Moderator

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    i still see none of these that show real world results... just stuff that someone(that never tested it in a car) has declared true, and everyone agrees blindly(copy/pasted)... because they read it, and have not tried it in a car either. home, pro, or test lab are easy to get the same results... but with so many differernt cars, with some many different variables you will not get the same results in each car... the only way to eliminate these variables, is to install your car audio system in your home... and forget about using it in your car. i read one article where a guy said that doubling your amps gains 3db, doubling your speakers gains 6db, and 10 times the watts only gains 10db... so where's the solid math 3db gain progression in that???
     
  13. Doc Brown

    Doc Brown Don't make me make you my hobby

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    Oooooooohhh, you got me there!:rofl:
     
  14. Doc Brown

    Doc Brown Don't make me make you my hobby

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    The problem is that you have no links to show otherwise.
    And neither does anybody else. And the reason for it is simple.
    It's how it works.

    And doubling your speakers gains 3db, too.

    Yes, ten times the watts adds 10db.

    90db at 1 watt
    93db at 2 watts
    96db at 4 wats
    99db at 8 watts

    I think you can see where the curve would give you 10db at 10 watts.
     
  15. twistid

    twistid Banged By Super Models Moderator

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    actually i did in the other thread, but you could not comprehend it.

    http://www.soundoff.org/result.htm is all the real world testing you should need, to realize though it's the gospel truth for home audio/pro audio/in a clean test enviroment... it's flawed for mobile audio. i suggest you go to a stereo comp... take note of what's in each car, take note of the lay out in each car, then look at the numbers these cars pull down.
     
  16. Doc Brown

    Doc Brown Don't make me make you my hobby

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    There isn't a single thing in loudspeaker design that I can't follow.
    If you were the one who posted the 10" woofers with 3k per,
    that site didn't show the spl. I said that. I also said I wouldn't waste my time finding it.
    And even then, you don't understand this, or you wouldn't say that shows anything.
    Making a voice coil handle tons of wattage has nothing whatsoever to do
    with whether doubling the wattage adds 3db or not.
    If anything, those massive copper coils probably compress like crazy, and produce even less than 3db with a doubling of wattage.

    You guys who think that there is something different about car audio
    are kidding yourselves.
    Every single thing you do is eventually "on paper".
    You put a ten inch woofer in a Civic and get 130db out of it,
    then you know you can put that same system in every single same-model Civic and get the exact same results.
    Doesn't that tell any of you guys anything?
    There's nothign mysterious happening at all.
     
  17. twistid

    twistid Banged By Super Models Moderator

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    no i was the one that posted the same link i posted in here... also you must be blind if you can't see the number's posted in the link you're talking about, and forgetful since you can't remember who said what.

    either you need to start wording yourself differently, or you are so stuck on things you've read and not expirenced... that no matter what we tell you, you'll still be clueless as to what we are trying to get acrossed to you. you tip-toe around the truth, but have yet to embrass it. you are the only one who is arguing about the same equipment, in the same model car(i have to add, as long as the install is exactlly the same)... in your defense of the double the wattage gain 3db. what everyone is against you about is you believe it's written in stone... so there's no way it can vary either up or down. in car audio there's more to gaining db... than just adding more power, or more speakers. on a side note if my car did [email protected], shouldn't it had done [email protected]??? well it didn't, what it did do was [email protected] same sub, same amp, same car, same eveything... just changed series/parallel.
     
  18. Ronin

    Ronin Guest

  19. eighteen_psi

    eighteen_psi Active Member

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  20. Doc Brown

    Doc Brown Don't make me make you my hobby

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    I don't doubt that last part at all. What I do doubt is whether you had a reference quality wattage meter during the two tests.

    If you don't know with utmost accurracy, what the exact wattage is,
    then you can't say one way or other about how many db's difference there are between systems.

    Obviously the exact same system, to a "T", with the identical settings, should give you the same results in identical cars.

    By the way, your link didn't work.

    Oh, and what's the part about series to parallel?
    Speakers?
     
    Last edited: Jul 9, 2006
  21. ngsm13

    ngsm13 New Member

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    You really suck at this game.

    Who's arguing with you, are you arguing with yourself?

    As stated before, once isolated, I agree with your statement.

    And, once again... to repeat again (b/c it seems you love to repeat yourself). When ALL variables are kept the same, doubling the wattage OR doubling the cone area will yield a maxmimum gain of 3dB.

    :).

    Tard.
     
  22. Doc Brown

    Doc Brown Don't make me make you my hobby

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    What you don't get, Dorothy, is that the variables make no difference whatsoever.
    Doubling the wattage of a speaker will only increase the volume by 3db
    no matter what the setting is.

    A 15" woofer in a closet door. A Bose cube on your bicycle handlebars.
    A Klipsch Horn in the corner of your bedroom.


    Double the wattage, get 3db.
     
  23. rebs

    rebs shares AIDS OT Supporter

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    motion for ban
     
  24. ngsm13

    ngsm13 New Member

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    Duh. :rofl:

    Wow. You really are dense, a lot more than I thought you were. Did I ever argue the setting? No.

    When I speak of variables, I'm talking about same enclosure... same frequency...same position... etc...etc...etc. Basically, if you duplicate the test... (wherever it may be)... and the only thing you change is the doubling of wattage, or doubling of cone area... the maximum gain will be 3dB.

    You are so dense, you don't even realize that I'm not arguing with your statement. :rofl: :hs: :wavey: :mamoru:

    Understand now? Wow.
     
  25. Doc Brown

    Doc Brown Don't make me make you my hobby

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    Look, here's the thing. I posted that comment about the 3db issue in the other thread, and pretty much everybody in there started up with the mantra whining.
    "you can't quantify ANYTHING in car audio, waaaaaaaaaaaa!!"

    Now if you think I was following who was saying what, you're mistaken.
    There's what, a half dozen posters in there slamming on me?
    And I should worry about who is who, why?

    The whole thing is almost humorous to me.
    A bunch of people who have never read two chapters of loudspeaker design going at it with me. With not one link that shows otherwise on the 3db issue.
    And as far as I can tell, you are the only one who even agrees with that.
     
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