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Maddening hum
LordBug 
7/8/08 9:21:04 PM
Immortal

Alright.

I've got a set of Logitech X-530's. I also have a new house.
At the old place, they were always plugged in. Everything was fine. Turn on, apply sound, sound came out. Turn off, peace and quiet.

In the new house, when they're plugged in but turned off, they hum. A maddening hum which on quiet days just gets into your head and can cause a wicked headache. The hum goes up a tiny notch when the speakers are turned on, but (obviously) is unnoticable when sound is applied.

I haven't done any great amount of testing - The powerpoint which the speakers are plugged into is on the other side of a wall to the fridge & microwave. I should try unplugging them, and will do, eventually.

Just wondering if anyone else has experienced this phenomena. I'm kindof wondering if I should contact Western Power and mention it to them (Though I've already gotten on to them about the apparent termite damage on the 'pole outside my house).

So. Experiences/opinions/ideas well appreciated :)

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Lord of nothing except my own dreams, so it's Bug to you.


I love you Sharleen *)

komuso 
7/8/08 11:09:26 PM
Overlord

http://www.epanorama.net/documents/groundloop/

Enjoy (:

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Master_Scythe 
8/8/08 12:49:38 AM
Titan

try running it through a UPS.

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4200+X2 939, ASUS A8N-SLI-D, Ati HD3850, 1gb,1tb total HDD, 109 DVD, LG DVD-rom.
Quote by Girvo
I've got a wicked tiny one that is ridiculously sensitive.



-80 
8/8/08 1:02:56 AM
Banned

Western Power will just tell you to get an electricain to check your earth.

Just keep pissing on the earth stake.......
(better check it with a meter first though)

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Mercury - you've got my number

LordBug 
11/8/08 10:47:45 AM
Immortal

Terrific read, thanks for that link komuso :)
Kinda makes me regret never really trying to get into a sparkie apprenticeship. Oh well, I can just make like a kiwi ;P

MS: That's the plan for the future, might even see if this will be enough to convince my partner that we need one now, even if only to protect the TV :)

-80: I would if I could find it, instead I have to suffer with dribbling down my leg ;P

-----
Lord of nothing except my own dreams, so it's Bug to you.


I love you Sharleen *)

Master_Scythe 
11/8/08 10:52:42 AM
Titan

Quote by -80
(better check it with a meter first though)



Oh its only 240v into his bladder, im sure it'll be fine.

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4200+X2 939, ASUS A8N-SLI-D, Ati HD3850, 1gb,1tb total HDD, 109 DVD, LG DVD-rom.
Quote by Girvo
I've got a wicked tiny one that is ridiculously sensitive.



komuso 
11/8/08 1:59:12 PM
Overlord

Quick fix.... snap off the ground pin, or use a two prong plug adapter, or replace the cable with a two prong plug. Is it an iec cable? Its not the safest practice perhaps, but its not uncommon and I do it regularly enough. I work as a sound engineer and av tech, and I come across dodgy power at quite a few venues, and removing the ground pin is the only solution sometimes. If you do remove the ground and the hum is still there, you have a problem with the power supply, or interference from another source.

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Master_Scythe 
11/8/08 3:30:29 PM
Titan

then try to RA it with a broken pin.

get a Double adaptor, plug it into that, then snap off the ground pin (the straight one isnt it?) on that.

that way you dont fuck your speakers up if they need to be RA'd

-----
4200+X2 939, ASUS A8N-SLI-D, Ati HD3850, 1gb,1tb total HDD, 109 DVD, LG DVD-rom.
Quote by Girvo
I've got a wicked tiny one that is ridiculously sensitive.



-80 
11/8/08 7:26:30 PM
Banned

You shonky bastards!
(yeah.....I'd probably try that too)
But only IF I was a licenced electrician!

-----
Mercury - you've got my number

LordBug 
12/8/08 9:46:20 AM
Immortal

Ahh bugger, it's already sans a ground pin, so that means the problem is coming from somewhere else :/

-----
Lord of nothing except my own dreams, so it's Bug to you.


I love you Sharleen *)

-80 
12/8/08 9:52:44 PM
Banned

Well, if it was fridge or microwave, it shouldn't do it when they are idle.

-----
Mercury - you've got my number

Chewhacca 
24/8/08 2:58:08 AM
Master

Unplug the fucking thing when you aren't using it. I've got a set of Z-5500s that do the same thing, The 'off' switch at the back of the sub fixes it. Hey, it's cheaper than a UPS. ;)

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Intel Core2 Quad Q6600 @ 3GHz, Gigabyte GA-P35-DS3R, 4GB PC-8500 (1066MHz) DDR2 RAM, Leadtek PX8800GT, CoolerMaster Stacker 832.

osama_bin_athlon 
24/8/08 3:03:49 PM
Hero
Immortal


it definitely sound like a shonky earth, but, I'd be more inclined to check out the earths on my speakers/connections/plugs/switches etc - it could be simply a dry solder joint/broken solder joint/dud lead etc etc.
are you running a turntable? if so, check the earth on that.
whatever the case, it sounds like something simple.
I don't think an UPS would help you at all, but, I consider them a necessity! I bought my APC UPS (ES 500) for $225 some 5 years ago, and it's still going strong, using the original battery! you can get a cheap UPS from MSY for under $100 - it amazes me that people will quite happily spend $3-4K on a comp, and then balk at the idea of investing $1-200 at protecting it!

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....it's called a 'snuke'.

eckythump 
24/8/08 11:18:30 PM
Champion

Try unplugging everything else and see if the problem goes away.

Try different power outlets.

A UPS probably would be a good option, and would quite likely fix it, as it'd act as a power conditioner.

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"Grandfather had an accident, he got burnt." "Oh no, how bad?" "Well, they don't fuck around at the crematorium."

osama_bin_athlon 
25/8/08 10:11:41 AM
Hero
Immortal


Quote by eckythump
A UPS probably would be a good option, and would quite likely fix it, as it'd act as a power conditioner.



I very much doubt it, I still get the noise of my fridge motor starting up through my speakers, even tho' I'm using an UPS.....as I stated b4, it's an APC, which are renowned as the best of them.

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....it's called a 'snuke'.

LordBug 
25/8/08 10:02:10 PM
Immortal

Chewbacca: Already doing that. It's either unplug the bugger, or leave it in which results in a constant hum from it, and a constant whine from the missus... ;P
Main problem is that the powerboard is in a bugger of a spot, so I have to shift the entire TV cabinet each time to get at it.

OBA: UPS is definitely on the cards now. Unfortunately, all the other expenses are suddenly popping up at the same time :/
Might maybe try opening it up one day.

Ecky: Just (Finally!) tried unplugging a few closeby items (Fridge, microwave, other things), no change. Thinking I might be best off saving up the pennies for a proper sparkie, considering my shed has better RCD protection than the house circuit :P

-----
Lord of nothing except my own dreams, so it's Bug to you.


I love you Sharleen *)

osama_bin_athlon 
26/8/08 7:28:04 AM
Hero
Immortal


LordBug, if/when you get an UPS, it's well worth it to pay the extra for an APC brand, their warranty/service is 2nd to none - when I purchased mine from the local PC shop, I took it home to find it had a faulty battery - so, I contacted APC, and the very next working day a courier arrived with my replacement (the whole thing, not just the battery), included in the delivery was a voucher for me to send the faulty one back free, and at my leisure. as far as warranty goes, they are the best that I've come across...ever. I can't speak highly enough of the company, and it's service. it's well worth paying the extra $$$'s in my mind. incidentally, the replacement has continued to work flawlessly for at least 5 years on the original battery. the best $220 I've ever spent.
;)

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....it's called a 'snuke'.

eckythump 
29/8/08 5:33:29 PM
Champion

Quote by LordBug
Ecky: Just (Finally!) tried unplugging a few closeby items (Fridge, microwave, other things), no change. Thinking I might be best off saving up the pennies for a proper sparkie, considering my shed has better RCD protection than the house circuit :P


Have you tried it in other powerpoints?

You said it didn't use to hum, right? Can you take it somewhere else and see if no-hummingness returns?

Lots of little things you can do to try and identify if it's the power, the device, or interference due to other devices/location.

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"Grandfather had an accident, he got burnt." "Oh no, how bad?" "Well, they don't fuck around at the crematorium."

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