Help with 350 hum?
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Joined: May 2008
Posts: 10
frequent flier
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OP
frequent flier
Joined: May 2008
Posts: 10 |
Thanks in advance for reading:
I have a new ep350 sub, and seem to have an ever present, rather soft, hum. The hum is present when my receiver is off, with the cable removed from the receiver, and even after the sub has gone in to "sleep" mode. With the sub in sleep mode, I can feel a slight vibration on the heat sink of the sub.
Any ideas where to start with this?
Thanks for your help!
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Re: Help with 350 hum?
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Joined: Jan 2004
Posts: 13,843 Likes: 13
shareholder in the making
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shareholder in the making
Joined: Jan 2004
Posts: 13,843 Likes: 13 |
Is the sub plugged into the same AC outlet as the other equipment, or a different one in the room? I had a similar problem when I had my twin 350's plugged into a different outlet for whatever reason.
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: Help with 350 hum?
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Joined: May 2008
Posts: 10
frequent flier
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OP
frequent flier
Joined: May 2008
Posts: 10 |
The sub is plugged in to a different outlet - my sub is behind my screen and my receiver is in a different room.
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Re: Help with 350 hum?
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Joined: Apr 2007
Posts: 4,877
connoisseur
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connoisseur
Joined: Apr 2007
Posts: 4,877 |
Do you have cable television service? I had a hum with my ep 500 that completely went away with the Axiom Ground Isolator
-David
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Re: Help with 350 hum?
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Joined: May 2008
Posts: 10
frequent flier
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OP
frequent flier
Joined: May 2008
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FIOS for TV and Internet but neither is currently present in the theater or connected to the circuits that the receiver or the sub are connected to... =(
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Re: Help with 350 hum?
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Joined: May 2003
Posts: 18,044
shareholder in the making
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shareholder in the making
Joined: May 2003
Posts: 18,044 |
Different outlet will do it. You can try a cheater plug (but not for permanent install, according to the electrician hawks around here) to see if that gets rid of the hum.
I am the Doctor, and THIS... is my SPOON!
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Re: Help with 350 hum?
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Joined: May 2008
Posts: 10
frequent flier
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OP
frequent flier
Joined: May 2008
Posts: 10 |
But why would it hum when the sub is not connected to the receiver and in sleep mode?
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Re: Help with 350 hum?
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Joined: Jan 2004
Posts: 13,843 Likes: 13
shareholder in the making
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shareholder in the making
Joined: Jan 2004
Posts: 13,843 Likes: 13 |
It is still plugged into an outlet. Just as a test, do you have a long extension cord you could run over to the same circuit, just to see if you get different results?
This may not be the problem, but the IT person in me likes process of elimination.
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: Help with 350 hum?
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Joined: May 2008
Posts: 10
frequent flier
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OP
frequent flier
Joined: May 2008
Posts: 10 |
I agree, next test will be to run an extension cord. Thanks for the idea!
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Re: Help with 350 hum?
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
Joined: May 2002
Posts: 10,654 |
Josh, since the hum occurs when the sub has no connection to the receiver or anything else in your setup, this isn't a ground loop because there's nothing to form a loop. A hum simply because the sub is plugged in indicates a possibly defective sub amp power supply section. Contact Axiom technical assistance directly for further information and possibly a substitute unit.
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Enjoy the music, not the equipment.
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