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Thread: Power draw question

  1. #1
    LimpBagel
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    Question Power draw question

    I have a 300w power inverter in my car. Lets say I have computer hooked up to it with a 140w PSU in it. I also want to hook up two sets of Labtec Pulse 424's. The sub is 20watts RMS and the satellites are 6w RMS each. I don't know the max ratings.
    140w PSU
    6w x 4 Satellites (RMS)
    20w x 2 Subs(RMS)

    Should everything be fine as far as the inverter goes? I don't want to draw too much power.

  2. #2
    Variable Bitrate
    Join Date
    Oct 2000
    Location
    Vancouver, Canada
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    274

    Post

    Uhmm, I'm not positive but I don't think you can do it that way. Power wattage and speaker wattage are different. See if you can find the ampage that the speakers use and then times it by 120. That'll give you the watts the speakers use... then just add it up.
    95 Honda Civic DX Coupe - In Progress
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  3. #3
    FLAC
    Join Date
    Apr 2001
    Location
    Here, There, Everywhere
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    1,436

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    So you want to use computer speakers for your car setup running off an inverter..... uhhhhhhhhh..... best of luck
    Project - GAME OVER :(

  4. #4
    LimpBagel
    Guest

    Post

    So you want to use computer speakers for your car setup running off an inverter..... uhhhhhhhhh..... best of luck
    I've been using the one set of speakers for about a year now and they sound great, I'm just adding another set of the same speakers its not like I'm just throwing all this crap in there without any knowledge on how they will sound.

  5. #5
    Maximum Bitrate
    Join Date
    May 2001
    Location
    Cincinnati, Ohio
    Posts
    461

    Post

    You should be fine. Just run it for a while and if it stays powered then your fine. If is overloads it will shut your inverter off and you will know you have too much wattage. Have you checked the power supply for the speakers? It should say something like 120VAC 60hz XXw (xx is the wattage)

  6. #6
    Newbie
    Join Date
    Jul 2000
    Location
    Australia
    Posts
    23

    Post

    Speakers will use more energy input than they output, depending on the efficiency of the amplifier. Plus they use less power at lower volumes. I used to run my computer + a 50Wx2 amplifier off the inverter, but it would cop out at higher volumes if I wasn't revving the engine. That is about the most "dodgy" set up there is though.....

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