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 Re: LFR1100 Actives hum
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Joined: Mar 2017
Posts: 109
veteran
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veteran
Joined: Mar 2017
Posts: 109 |
I have the same issue with my EP500 my triggers cause my hum. Once I pull the trigger plug out hum is gone.
I removed the ground screws but it is still there any ideas??Hum is in all speakers/
RJ
M100 V4, VP180 V4,QS10s x4 V4 M2 V4 X2 EP500 V4 X 2,ADA 1500-3, ADA1250 - 7 N3
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Re: LFR1100 Actives hum
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Joined: Jan 2007
Posts: 10,490 Likes: 116
shareholder in the making
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shareholder in the making
Joined: Jan 2007
Posts: 10,490 Likes: 116 |
RJ, try to make sure the trigger cables are not running parallel and close to power cables. That's one way for noise to get in. Cables made with twisted wires may help.
House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
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Re: LFR1100 Actives hum
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Joined: Dec 2019
Posts: 779 Likes: 40
aficionado
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aficionado
Joined: Dec 2019
Posts: 779 Likes: 40 |
Twisted cables reduce noise. So should I be separating my cables and twisting them?
I quick internet search comes up with many plausible and wordy explainations about electromagnetic fields and balancing when twisted.
I doubt many folks would need to do this. Maybe only if you where having noise issues.
Kinda cool though that that would work.
Last edited by Kodiak; 10/31/20 10:43 PM.
M60ti Hafler9505 & JFET Pre,Axiom Transformer. M3 Marantz PM7200 Dual 606 Denon 2700 M2 Yammy RX595
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Re: LFR1100 Actives hum
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Joined: Jan 2007
Posts: 10,490 Likes: 116
shareholder in the making
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shareholder in the making
Joined: Jan 2007
Posts: 10,490 Likes: 116 |
Twisted cable is the real deal. It's not snake oil. Of course if the environment is electro-magnetically benign or the equipment is immune, then you don't need it.
House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
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Re: LFR1100 Actives hum
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Joined: Sep 2009
Posts: 1,898 Likes: 101
connoisseur
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connoisseur
Joined: Sep 2009
Posts: 1,898 Likes: 101 |
Sound more like ground loop problem rather than an injected signal one.
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Re: LFR1100 Actives hum
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Joined: Jan 2007
Posts: 10,490 Likes: 116
shareholder in the making
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shareholder in the making
Joined: Jan 2007
Posts: 10,490 Likes: 116 |
It usually is in audio. I wish someone would outlaw three prong plugs.
House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
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Re: LFR1100 Actives hum
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Joined: Mar 2002
Posts: 3,749 Likes: 37
connoisseur
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connoisseur
Joined: Mar 2002
Posts: 3,749 Likes: 37 |
I have the hum with my LFR1100As and ADA1500s. When I turn on the overhead floods in cans, I get the subwoofers humming as well.
Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.
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Re: LFR1100 Actives hum
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Joined: Sep 2009
Posts: 1,898 Likes: 101
connoisseur
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connoisseur
Joined: Sep 2009
Posts: 1,898 Likes: 101 |
It usually is in audio. I wish someone would outlaw three prong plugs. A ground loop is in the audio. The ground reference of one side is moving relative to the other ... one side is putting out zero volts relative to its ground and the other sees a signal because it’s ground is waving around relative to that zero volt output ... but you knew that ...
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Re: LFR1100 Actives hum
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Joined: Sep 2012
Posts: 1,037 Likes: 69
connoisseur
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connoisseur
Joined: Sep 2012
Posts: 1,037 Likes: 69 |
Its great to be an electrician. Hire one today! ![[Linked Image from pics.me.me]](https://pics.me.me/thumb_learn-through-experience-37753396.png)
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Re: LFR1100 Actives hum
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Joined: Sep 2009
Posts: 1,898 Likes: 101
connoisseur
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connoisseur
Joined: Sep 2009
Posts: 1,898 Likes: 101 |
Is that from your family album Trevor?
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