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Post by Boomzilla on Sept 23, 2016 19:50:20 GMT -5
It's been my experience that some amplifiers I've owned (one tube, one solid-state, and one a tube/ss hybrid) hum consistently - but ONLY when plugged into power conditioner devices.
The vast majority of amps don't seem to care whether or not there is a power conditioner between them and the wall. So this is a technical question for one of youse guys with experience in AC power theory & practices -
What's the difference in the amp itself that makes it "incompatible" with power conditioners?
Thanks - Boomzilla
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Post by 405x5 on Sept 23, 2016 21:33:34 GMT -5
When my amps are running, the only thing humming is my wife.....God, I hate when she does that.
My tack is to ask her if she would like me to shutdown the system so she can sing solo.
That usually clears up the hum.😱
Bill
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Post by teaman on Sept 23, 2016 22:14:46 GMT -5
I used to love hummers while listening to music...oh wait, that's not what you meant was it...
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Post by monkumonku on Sept 23, 2016 22:55:16 GMT -5
When my amps are running, the only thing humming is my wife.....God, I hate when she does that. My tack is to ask her if she would like me to shutdown the system so she can sing solo. That usually clears up the hum.😱 Bill What do you use to cover up the frying pan dents on your head?  |
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DYohn
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Posts: 18,494
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Post by DYohn on Sept 23, 2016 23:44:56 GMT -5
Ground issues
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Post by adaboy on Sept 23, 2016 23:47:09 GMT -5
Funny responses guys lol!
Boom, hum equals grounding issues. Could be as simple as needing a ground lift or something to that effect.
I thought this came up when someone was asking about the CMX and Big Dan and KeithL chimed in. (I could be wrong)
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Post by audiobill on Sept 24, 2016 1:46:37 GMT -5
Some power conditioners output a sawtooth wave instead of a sine wave......
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Post by 405x5 on Sept 24, 2016 8:08:50 GMT -5
When my amps are running, the only thing humming is my wife.....God, I hate when she does that. My tack is to ask her if she would like me to shutdown the system so she can sing solo. That usually clears up the hum.😱 Bill What do you use to cover up the frying pan dents on your head? When I sold the motorcycle,🏍 I kept the helmet👌 |
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Post by vneal on Sept 24, 2016 8:22:02 GMT -5
amps should be dead quiet
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stiehl11
Emo VIPs
Give me available light!
Posts: 7,269
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Post by stiehl11 on Sept 24, 2016 8:31:58 GMT -5
It's been my experience that some amplifiers I've owned (one tube, one solid-state, and one a tube/ss hybrid) hum consistently - but ONLY when plugged into power conditioner devices. The vast majority of amps don't seem to care whether or not there is a power conditioner between them and the wall. So this is a technical question for one of youse guys with experience in AC power theory & practices - What's the difference in the amp itself that makes it "incompatible" with power conditioners? Thanks - Boomzilla They hum because they don't know the words... |
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Post by 405x5 on Sept 24, 2016 8:36:44 GMT -5
It's been my experience that some amplifiers I've owned (one tube, one solid-state, and one a tube/ss hybrid) hum consistently - but ONLY when plugged into power conditioner devices. The vast majority of amps don't seem to care whether or not there is a power conditioner between them and the wall. So this is a technical question for one of youse guys with experience in AC power theory & practices - What's the difference in the amp itself that makes it "incompatible" with power conditioners? Thanks - Boomzilla What are you "hearing" with this power conditioner that's making this entire exercise worth the effort, if you don't mind my asking? Bill |
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Post by Boomzilla on Sept 24, 2016 10:13:58 GMT -5
Of all the items on the conditioner (TV, cable-box, AirPort Express wireless hub, Oppo player, Ethernet port, power amps) only ONE has a hum problem. And plugging it into the wall doesn't solve its hum, either. So the amp itself is humming - not the amp's interaction with the conditioner (as I first thought). But I HAVE had two components in the past that DID hum with any conditioner, and DIDN'T without one. They were the Rouge Magnum 88 tubed integrated amp and a Chinese tube headphone amp (forgotten the model). So, as previous posters have pointed out, obviously the conditioner introduces enough of a ground issue that some equipment hums. And equipment that hums with or without the conditioner not only doesn't know the words but is also defective.  |
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Post by adaboy on Sept 24, 2016 10:20:57 GMT -5
Smart man. Have you tried a hum eliminating product?
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Post by Priapulus on Sept 24, 2016 10:53:28 GMT -5
I thought the purpose of a Power Conditioner was to eliminate hum? Perhaps it is defective?
Sincerely
/b
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Post by vcautokid on Sept 24, 2016 11:12:17 GMT -5
Some do not account for DC offset in the AC line causing transformer resonance, I assume you are not speaking of a mistaken ground loop Right? Okay.
The resonance is hum. Sometimes on laminated iron core box transformers that have plates bonded together you get lamination rattle. Again hum. A toroidal hums too though it is an iron doughnut with copper wires wrapped around it. So if your power conditioner does isolate or eliminate DC, than you can play AC/DC without too much DC for instance and hum the words yourself. All joking aside, to a certain extent, DC is there. How much? Varies from place to place.
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