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USB Audigy 2 NX, D-Link USB Hub, and 15 W POL

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  • USB Audigy 2 NX, D-Link USB Hub, and 15 W POL

    Ok, I have a USB Audigy 2 NX (Creative Soundblaster) and a D-Link 4 port powered USB hub. I want to power them both from a single Opus 15 W POL (http://www.mp3car.com/store/product_...roducts_id=138)

    Looking at the AC power plugs, the D-Link power supply puts out 2.5 amps at 5.0 volts, and the Audigy power supply puts out 1.5 amps at 5 volts. Togther, that adds up to 4.0 amps at 5 volts.

    The Opus POL puts out up to 3.0 amps (P=VI), P=15, V= 5, so I = 3. Duh. It also says that on the spec page. Duh, I say to myself.

    3 amps does not equal 4 amps. Duh. So, according to specs it won't work. However, I honestly can't imagine either of those two system consuming as much current/power as the power supplies put out, the USB Hub especially. On it, I will have two things plugged in, one of them being Audigy 2 (which whouldn't draw any power since it is powered by it's on supply) and a GPS reciever (BU-353). So how it draws 2.5 amps, I don't know. The Audigy 2 might draw the full 1.5 amps, but I suspect it doesn't.

    Anyways, my question, for those with experience with the Opus POL, what all have you had hooked up to it, and what experiences with the actual load have you had? Do you think I can get away with plugging both the Audigy 2 and the USB hib into it? Or should I use a seperate POL for each one?

    Thanks
    Dave
    2005 Infiniti G35 6MT Coupe Black/Black
    Core Duo CarPC
    CarDomain page

  • #2
    First of all, Just because the power supply can provde 2.5 amps, doesn't mean the hub will always pull 2.5 amps.

    The Hub doesn't draw much power for itself, it needs 1/2 amp for each port on the hub, so 4 ports = 2 amps. Worst case, the hub is drawing 1/2 amp on its own, but that sounds a bit high, I'd guess 0.25 amps, but 1/2 amp max.

    Your GPS won't draw more than 1/2 amp, USB regulations.

    So add it up:
    USB Hub 500mA (max)
    Audigy 1500mA
    GPS 500mA (max)
    --------------------
    2.5 amps.

    You can still plug at least one more device into the USB Hub.

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    • #3
      The hub will be used to power the USB GPS (0.5A), but not the Audigy. (the usb hub can provide a max of 0.5A to every port - in case they were used.
      I think you would be fine.

      Final Touches

      Car: 2002 Mitsubishi Magna EI
      CarPC: SP13000, M2-ATX, 512 MB RAM, 120 GB 2.5" HD, X-Fi Sound Card, Xenarc 700TSV, Garmin 18 USB.
      Audio: 2X15" Rockford Punch Z, 1 Rockford Punch 2-ch Amp, 1 Soundstream Lil Wonder II 4-ch Amp

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      • #4
        But the audigy will be on the same POL. At least that is what I am asking. Can I put the hub and the audigy on the same 15W POL?

        Dave
        2005 Infiniti G35 6MT Coupe Black/Black
        Core Duo CarPC
        CarDomain page

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        • #5
          Originally posted by Caelric
          But the audigy will be on the same POL. At least that is what I am asking. Can I put the hub and the audigy on the same 15W POL?

          Dave
          Sure, that's what I do. The Audigy proably doesn't connect to the 5V line on the USB hub.

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