 Re: Long Time
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Joined: Sep 2008
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Does the sound go away when you unplug the coax cable and just leave the AC power plugged in? Is it a low rumble bass sound, or more of a hum like a transformer makes? Ground screw was removed long ago to stop the ground loop hum. The sound does not stop when I unplug the sub cable. The only way to stop it is to turn it off or unplug it. The sound is a lower sound - not like a 60 hz hum. Difficult to describe. It is like the sound of machinery operating far off in a big building. Like background noise. Correct me if I am wrong, but it should be silent when nothing is on? At any rate this is my third amp on the 500. It doesn't point to a ground loop like your troubleshooting shows. Unfortunately the fix for this is another amplifier.
I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.
-Max Payne
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Re: Long Time
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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
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Rob, the fact that this noise is present even when the coaxial cable to the sub isn't connected and the only connection is the power cord, shows that this isn't a ground loop noise, since there's no connection to form a loop. Apparently there's a problem in the power supply section of the sub amp and either the rectifier or a filter capacitor is going bad.
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Enjoy the music, not the equipment.
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Re: Long Time
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Joined: Jul 2004
Posts: 1,443
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I recall that you had amp problems in the past, was hoping it was resolved.. Have you tried different outlets, or one on a different circuit just as a test? Randy, I will try another outlet, the way the room is wired, however, they will all be on the same circuit. Other than this issue, the sub is performing admirably. I was concerned that it could escalate - that is the reason for the post. My wife went to visit our daughter the other night and I rented Battle Los Angeles. Watched it loud and there is plenty of LFE.....
"A fanatic is someone who can't change his mind and won't change the subject" Churchill
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Re: Long Time
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Joined: Jul 2004
Posts: 1,443
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[/quote]It doesn't point to a ground loop like your troubleshooting shows. Unfortunately the fix for this is another amplifier. [/quote]
We'll see. I plan to call and talk with JC tomorrow.
"A fanatic is someone who can't change his mind and won't change the subject" Churchill
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Re: Long Time
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Joined: Jul 2004
Posts: 1,443
connoisseur
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Rob, the fact that this noise is present even when the coaxial cable to the sub isn't connected and the only connection is the power cord, shows that this isn't a ground loop noise, since there's no connection to form a loop. Apparently there's a problem in the power supply section of the sub amp and either the rectifier or a filter capacitor is going bad. Yeah, I never thought it was a ground loop but I went through the checks just to eliminate. Just another item to vie for my attention.
"A fanatic is someone who can't change his mind and won't change the subject" Churchill
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Re: Long Time
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Joined: Jul 2004
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Just to bring closure....JC is making it right. Should have a new amp sometime in the next couple of days.
"A fanatic is someone who can't change his mind and won't change the subject" Churchill
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Re: Long Time
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Joined: Sep 2004
Posts: 11,458
shareholder in the making
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shareholder in the making
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So wrapping up the thread title: "You Love Axiom Long Time?"
That was flagrantly tacky, I know.
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
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Re: Long Time
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Joined: Jul 2004
Posts: 1,443
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So wrapping up the thread title: "You Love Axiom Long Time?"
That was flagrantly tacky, I know. I'm Fergie Ferg and me love you long time.
"A fanatic is someone who can't change his mind and won't change the subject" Churchill
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 Re: Long Time
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Joined: Jul 2004
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Well.....not quite wrapped up yet. I just got the replacement amp.....good. THIS version does not have an RCA input on the back....bad. It does have the XLR 1/4 input.......good. Axiom did not send the male adapter I need to connect to the new amp.....bad. So...just got off the phone with Axiom and they are going to send the adapter. Being that this is my 4th amp for the 500 and knowing that Axiom will make it right - I still feel like..... 
"A fanatic is someone who can't change his mind and won't change the subject" Churchill
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Re: Long Time
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Joined: Jul 2004
Posts: 1,443
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There must be some US Customs delay in crossing the border? When I get the ship notification from Axiom, It always state the tracking number will become active midnight the following day. I got notification on Wednesday that the adapter has shipped but I couldn't track until last night and it says delivery next Tuesday. Not complaining - just musing.
"A fanatic is someone who can't change his mind and won't change the subject" Churchill
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