Amp turning on and off at high volume !?!?
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This is a discussion on Amp turning on and off at high volume !?!? within the Electronics/Car Audio forums, part of the Interior Mods category; Anyone have any idea why an amp would work fine at low volume, but then clip on and off at ...

  1. #1
    Registered User hamz01's Avatar
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    Amp turning on and off at high volume !?!?

    Anyone have any idea why an amp would work fine at low volume, but then clip on and off at high volume? The wiring is perfect, I'm sure of it (4 guage power wire into an adapter sending 8 guage to the amp, then an 8 guage ground wire; all connections are solid). The amp is a Kenwood, 2 years old, running two MTX 6000 10" woofers. I cannot for the life of me figure out what's going on.

    Any feedback would be great. Thanks!
    Brandon
    '11 WRX 5-Door, Dark Gray Metallic

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  3. #2
    Registered User 04blkWRX's Avatar
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    Is it under a seat or something? It may have a thermal shutoff, although it probably would not come back on right away if that's it...

    Are your lights dimming or anything when it's cutting out?
    06 S40 T5 AWD
    Previous: 2004 WRX
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  4. #3
    Registered User hamz01's Avatar
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    The amp is in the trunk and it is not overheated. Lights don't flicker when the amp bounces on and off. When the amp worked, the lights dimmed with a hard bass hit, but that was expected because the system doesn't have a capacitor.

    I had one guess for why the amp is acting the way it is. If you feed certain amps too low of an impedance (like running subwoofers at 2 ohms when the amp needs a 4 ohm load), some amps go into "safety mode" where they shut off so they won't get damaged. They might go off and on repeatedly to keep testing whether or not they're getting the right impedance. But the only way this could be the reason for my problem is if it's possible to damage a subwoofer, lowering its impedance, but not blow the woofer. Is this possible? A blown woofer just creates a break in the circuit, so it'd have to be damaged with less resistance for my scenario to work. The system used to work perfectly until a few days ago.

    Thanks for the help.
    Last edited by hamz01; 07-29-2004 at 11:54 AM.
    Brandon
    '11 WRX 5-Door, Dark Gray Metallic

  5. #4
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    youre asking fortoo much out of it.

    turn the gain down

    youre just drawing too much and its shutting off as a protective feature.
    Vanitas vanitatum...et omnia vanitas

  6. #5
    Registered User skimann20's Avatar
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    Hows the ground conection? Sounds like a bad groud?
    I bought a 500sqft garage and a house comes with it...

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    most likely a wiring issue would produce these symptoms regardless...wouldnt it?

    not just at high volume (high draw)
    Vanitas vanitatum...et omnia vanitas

  8. #7
    Registered User skimann20's Avatar
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    I was thinking the vibration would cause a loose/improper ground conection... he is running two 10s
    I bought a 500sqft garage and a house comes with it...

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    most likely power issue, not wiring...

    anyways good luck! turn that gain down and fine tune your radio from there...
    Vanitas vanitatum...et omnia vanitas

  10. #9
    Registered User WRX-games's Avatar
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    My guess is that your amp is "clipping", so yes, do what the others are suggesting... Turn down your gain a bit.
    James

    "Never criticize a man until you've walked a mile in his shoes. That way, if he doesn't like what you have to say, it'll be OK because you'll be a mile away and you'll have his shoes."

  11. #10
    Registered User hamz01's Avatar
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    It was the subwoofers... they were both blown!!
    Brandon
    '11 WRX 5-Door, Dark Gray Metallic

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