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Thread: External Soundcard problem??? turning on and off??

  1. #11
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    Apr 2007
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    This problem still persists. I went through a few calculations, and back to the basics, I have a 1000 watt 4 channel amp; I know, way more power than what I really need to drive my polk components, so that is all that I had that was available.

    P=I*E where P = power in watts, I = current in amps, and E = voltage (should be about 12v from the battery)

    so, 1000 = I * 12v

    so the amp is drawing about 83 amps of current. too much? maybe that is why other components in the car are affect the audio??

    say i were to use a 200 or 300 watt amp, the current draw would be less than a third of what it is now; it would be about 17 or 25 amps respectively.

    this is all speculation right now, so any input on this? what do you guys think?

  2. #12
    Car Audio Moderator durwood's Avatar
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    Check your grounds on everything. Make sure you have good metal contact. Scrape paint away and use a start washer if you need to. Verify your voltages. I think your 12v power is dropping too low, or it's a bad ground. I vote for bad ground.

  3. #13
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    ground is very secure. i sanded way down to shinny metal and used a good sheet metal screw and washer on top of the terminal. like i said, the computer works perfectly even when the sound cuts out and the computer and amp are grounded at the same point.

    BTW.. today i had the music pretty low, and no cutting out occurred at all, but i only had the 2 rear speakers on. for some reason, i just have a gut its the amp that is crapping out. i think im gonna try to get a decent 4 x 50 watt or 4 x 75 watt amp and see if an amp with less of a power draw does the trick.

  4. #14
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    Quote Originally Posted by rnstein69 View Post
    ground is very secure. i sanded way down to shinny metal and used a good sheet metal screw and washer on top of the terminal. like i said, the computer works perfectly even when the sound cuts out and the computer and amp are grounded at the same point.

    BTW.. today i had the music pretty low, and no cutting out occurred at all, but i only had the 2 rear speakers on. for some reason, i just have a gut its the amp that is crapping out. i think im gonna try to get a decent 4 x 50 watt or 4 x 75 watt amp and see if an amp with less of a power draw does the trick.
    Are you running the remote for the amp off the accessory fuse, or one connected to the devices which seem to be causing your audio to shut off? A 30-amp car relay for remote would solve that problem. I would look at undervoltage as well. A 1000 watt four channel amp that's not too efficient, plus a carputer and peripherals, can be a large current draw for a factory charging system. Some amps will tell you via colored light whether it's shutting off due to undervoltage or whether it's in protect due to something like a speaker wire going to ground somewhere.
    I have too much time and too little aggravation in my life, so I built a carPC. ;)

  5. #15
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    rnstein,
    Im not an expert on audio, but have decent experience with audio and computers.
    I would recommend
    1. Checking your amp when the sound goes off, is the amp is still on, sometimes when an amp overheats, it shuts off itself until cooled, instead of blowing up.
    2. Check if the remote wire that you are using off of M2 is giving current to the amp.(in which case the amp will be off).

    If its non of those two, i would keep a headphone handy, and when the sound goes off, plug it into ur computer and see if u can hear anything. that would rule out if its the computer sound or not.

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