505 hums when receiver turned off

daslolo
daslolo Posts: 7
edited September 2004 in Subwoofer Hookup & Bass Management
Is this normal ?

I notice that when I disconnect LFE jack from the rear of my 505, the hum ceases.

Thanks.
Post edited by daslolo on
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  • Airplay355
    Airplay355 Posts: 4,298
    edited September 2004
    ground loop maybe?
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  • daslolo
    daslolo Posts: 7
    edited September 2004
    What is this and how do I fix it ?
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  • Airplay355
    Airplay355 Posts: 4,298
    edited September 2004
    I'm not really sure and I don't know. I'm not even sure if thats what your problem is. Sorry lol. Someone who can help better will show up, don't worry.
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited September 2004
    Don't think it's all that uncommon. My Carver M1.5t produced a hum when I shut down my pre-amp. Right or wrong I attributed it to interrupting their common ground when I flipped the pre's power switch.

    Simple solution, leave the AVR on... For vacations and electrical storms shut both the AVR and sub down...
    More later,
    Tour...
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  • RensoPLC
    RensoPLC Posts: 2
    edited September 2004
    Any time you have subwoofer associated hum it is 99,9 percent due to a ground problem as stated in an earlier reply. I would bet that it is most likely due to a bad cable. Yes when these audio cables go bad the internal wires touch (ground to signal) and this will happen.

    try a new cable or at least a spare ne you may have !

    I hope this helps
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