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Sub hum won't go away
#153234 12/09/06 01:09 AM
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Stymie Offline OP
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Need some additional troubleshooting steps as the standard ones aren't working. Unless I'm doing something wrong, which is very possible.

My system had been playing for several hours when the sub started humming very loudly. I shut everything down (switching off the power on the EP500) thinking it may have gotten hot or something. So, I waited an hour or so and switched the 500 back on before turning on the revceiver. The 500 started back with the hum. Ground loop issue? I unplugged the line in on the 500 and it still hummed. I then moved the 500 plug (all components are plugged into a Tripplite HT10DBS)to a different circuit. Still she hums. This is with the line in disconnected from the sub. I then disconnected the incoming cable connection from the HT10DBS. It feeds into this before it feeds into the cable box. Still she hums. I then disconnected the outgoing cable from the HT10DBS that actually feeds the cable box. So, incoming is disconnected from the HT10DBS and the outgoing is disconnected. The line in on the sub is disconnected and the plug is on a different circuit via a construction grade extension cord. I even tried using a two prong plug to eliminate the ground prong. No dice.

Any suggestions? I was planning to head to the store to get an isolator, but if the cable is disconnected from the equipment and it's still humming, would it make a difference?

This really blows as I was planning to watch Miami Vice the movie tonight.

All suggestions are appreciated.

Edit: Meant to add that I also removed the chasis ground on the back of the 500 and it still hums. Just to clarify, there is nothing connected to the 500 during these tests.
Stymie

Last edited by Stymie; 12/09/06 01:16 AM.



Re: Sub hum won't go away
Stymie #153235 12/09/06 02:57 AM
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Sty, from your description it appears that you've taken all the steps to identify/eliminate a ground loop and that isn't the problem. Especially since this suddenly developed after playing for quite a while it would seem to indicate a defect in the sub amp. Probably you should contact Axiom directly as to how to proceed.


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Re: Sub hum won't go away
JohnK #153236 12/09/06 03:04 AM
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Stymie Offline OP
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Thanks for the reply John. Contacting Axiom was my next course of action. I was hoping that I missed something though.




Re: Sub hum won't go away
Stymie #153237 12/09/06 04:32 AM
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axiomite
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Gotta agree with John. Give Axiom a call. Sorry you have to go through this. The good news is, Axiom will take good care of you.


Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton
Re: Sub hum won't go away
Stymie #153238 12/09/06 09:53 AM
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Quote:

This really blows as I was planning to watch Miami Vice the movie tonight.


Did you, by any chance, let on to the sub that you were about to watch THE MIAMI VICE MOVIE?!?

I'd try to rule out suicide before calling Axiom.

Bren R.

Re: Sub hum won't go away
Stymie #153239 12/09/06 12:52 PM
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Stymie,

Have you tried step 8 in your manual?

Quote:

GROUND LOOP:
If your subwoofer is producing a 60 Hz hum; remove the Chassis Ground Screw. If this does not solve the 60 Hz hum, call 1-866-244-8796 or consult the full manual at www.axiomaudio.com/manual_ep500600.html





This may take care of it.


Shawn

Epic 80/600 + M3's + M3 Algonquins + M2 Computer + EP125
I think I'm developing an addiction.
Re: Sub hum won't go away
real80sman #153240 12/09/06 02:36 PM
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Shawn:

Stymie wrote:
Quote:

Edit: Meant to add that I also removed the chasis ground on the back of the 500 and it still hums.




So it looks like he DID try that....


::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
Re: Sub hum won't go away
MarkSJohnson #153241 12/09/06 03:28 PM
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Well, there you go! I read his post twice and missed it both times. I really need to SLOW DOWN and absorb everything I read before replying.


Shawn

Epic 80/600 + M3's + M3 Algonquins + M2 Computer + EP125
I think I'm developing an addiction.
Re: Sub hum won't go away
real80sman #153242 12/10/06 05:51 AM
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Stymie Offline OP
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I opened a ticket with Axiom this morning and they're going to get back to me with the next steps. Hopefully it's not fatal.

Maybe I should have gone with Superman over Miami Vice.




Re: Sub hum won't go away
Stymie #153243 12/10/06 03:37 PM
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So have you tried removing the ground screw as mentioned above?


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


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