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Thread: Subwoofer noise

  1. #1
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    Subwoofer noise

    I find after I'm lying in bed trying to sleep after the t.v. is shut off for about an hr I hear a noise similar to a thud... kind of like powering off (or on) a large amp or something powerful. I assume it's coming from the sub but I am not 100% sure.

    Any ideas?

    I'm sure it's nothing serious but I am just wondering what the noise is.

  2. #2
    Forum Regular Kevio's Avatar
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    Some subwoofers and amplifiers have a circuit that automatically powers it up when it detects an input signal and powers it off after no signal is detected for a period of time. What kind of sub do you have? Is there a pilot light on it?

  3. #3
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  4. #4
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    There is a green light in the front when it's on if that's what you mean by a pilot light

  5. #5
    Forum Regular Kevio's Avatar
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    I'll bet the green light goes off at the same time that you hear the sound. This is normal.

  6. #6
    Charm Thai™
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    yeah sounds like the auto on/off circuitry is kicking in from a lack of signal after a certain period of time. functioning as designed.

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