Ground loop isolators prevent hum buzz and interference

[SWGuruu]

hey can this (or any cheaper model) be used on a hauppauge HD-PVR?

[oconnellcom]

NICECABLEs

[sledgehead2000]

i have tried using the skytronic and it works but it also effects the final sound ..it makes some tracks boomy. what are the ones you use in this video and do they have a negative effect on the final sound ???

[bnsf7512]

will this work for my car?

[Diigify]

Anyone tried this on an Hauppauge HD PVR?

[MBP6705]

I tried one of these between my deck and my car amp to eliminate alternator noise. At first, it took out most of the noise, but it also took out the base lines and most high parts of songs.  Then about a day later the noise came back. Could my gli have been faulty?

[panoskira]

I have an Alesis multimix 4 usb, does this works with it?

[valewaytechnology]

@panoskira I don't see why not - all a GLI does is isolate the audio ground between to pieces of equipment.

[YuckyLuckyDucky]

So are the rca connected directly to your computer? That's what I understand when you said "need one(GLI) for each audio line that you are taking from the computer". If so how are you connecting all the rca onto the computer? Correct me if I'm mistaken.

[valewaytechnology]

@YuckyLuckyDucky Connections are like this ....

Computer -> usb sound card -> stereo phono out 1 -> gli -> mixer

Computer -> usb sound card -> stereo phono out 2 -> gli -> mixer

The sound card has two stereo outs, each output needs a GLI.

[grufiog]

I still can hear Hum on this video 

[Guitarman0]

Great video, this is just what I have been looking for :)

[TheCharIatan]

isnt it a band aid solution?

[valewaytechnology]

@TheCharIatan Does it fix the problem quickly and safely - yes it does.

Otherwise you're hunting for the piece of equipment which is causing the interference and / or trying to re-arrange the earth connections between equipment. Great if you've got the time and the skills ...

[TheCharIatan]

@valewaytechnology agreed mate ;-)

[Jaksnacks]

hi, sorry if this is a stupid question, I have a pc sound card that sends audio signals to my amp and have discovered that a hum is created from my pc monitor being connected, will a ground isolator fix this problem? and if yes can you suggest a good quality one that wont have much or any affect on quality of sound.

[valewaytechnology]

@Jaksnacks Hi there - yes this could be a ground loop. As the isolators aren't expensive I'd get one and try it anyway. Can't suggest any particular models other than the ones we do on our own website, since they work fine.

[007HubbaBubba]

Oh hummh! What about older Video/Audio receivers plus older speakers? Got a mean hum coming from rear JVC's hanging on the wall?

[valewaytechnology]

@007HubbaBubba Not sure in that case. If you have a hum with nothing plugged into the AV receiver then it's a fault on the receiver.

[007HubbaBubba]

@valewaytechnology- old A/V receiver with fairly old speakers, but I also kinda quikly hooked everything up, and got lost with some unmarked well speaker wire for my rear speakerst probably has something to do with it. But as of now I can live with it, the ambient background noise, lshould cancel any humming out anyway! From my hearing standpoint that is.

[randol35]

When using my laptop to play music through my home audio receiver/speakers, I can hear the radio/static through the speakers. I thought it was a ground loop problem so to see I pulled the ground pin out of the laptops charging cable, but still I hear the exact same radio/static. When the laptop is unplugged and running on battery power, I dont get the static/radio. Do you know how to get rid of that? I tried snap on ferrite choke cores but that didnt help at all.

[valewaytechnology]

@randol35 Either a fault with your home audio system or the onboard sound card on your laptop is generating the noise itself. Test your audio system by pluggin in an ipod or similar stand alone player, if you still get the interference the fault is with your audio system.

[956miggz]

@randol35 What is happening in your set up is a ground conflict. I would have avoided pulling out the ground pin because that's not really safe lol You could have just used a ground lift adapter for the power wall outlet. Things you can still try are making sure that all your equipment gets plugged into a single power strip. Make sure that you are using balanced cables, as mixing unbalanced cables with balanced might create a collection of noise signal.

[007HubbaBubba]

@randol35 -, and so I reversed one speakers wiires, and knocked out most of the hum, but I noticed, yesterday when getting online on Firefox 5, that the hum and static was fairly loud, but it is not doing it today, so I just don't know for sure of what it is. Oh, and did I mention that one amp or preamp on the receiver is out, so I just hooked both speakers to one side, and tha

[deanosabbathfan]

why is it when i now plug my turntables into the ground loop isolator then into the mixer i get no sound??? would the isolator do the same thing cut out the buzz ive got going through the line out of my mixer into the amp??

[valewaytechnology]

@deanosabbathfan Depends what's causing the buzz. The isolators just break the ground connection between the equipment, they are back to back transformers which allow the AC audio to pass but not the DC ground current.

[aprilrosemusic]

@Valewaytechnology

You are correct, if high energy is involved, then it make sense to think of lamination

Very good. 5 stars

[aprilrosemusic]

@liof16 These isolators are made of transformers, and transformers hum when they lose internal bond/glue of the stack.

[valewaytechnology]

@aprilrosemusic ... Wrong! Transformers which handle AC MAINS can physically vibrate if the laminations aren't bonded - thus giving hum. The transformers in these isolators are NOT handling AC MAINS, thus NO HUM. Even if the lamintations weren't bonded (they are) there isn't enough energy in the audio level signals to physically vibrate the laminations.

Thanks - Paul M

[liof16]

Hiya mate could you help me out please, I have my laptop permanently plugged into my amp, and obviously with the laptop being powered all the time via AC I was getting a nasty high pitched wine from it - so I bought and installed a GLI which has done a spot on job for around a month. However, just today, I noticed a very, very faint wine start to reappear. Do they wear out over time? Or is it just because I bought a cheap one for a fiver? If so can you recommend a decent one which will last?

[valewaytechnology]

@liof16 They don't wear out. It's either faulty or you are picking up noise from another source. Run the laptop on battery power - is the noise still there ? If so it isn't a ground loop.

[liof16]

@valewaytechnology Yeah I already checked without the power. Definitely the GLI letting a tiny little bit through still. It's probably always been like that to be honest though, this only happens at stupidly high volume - when you unplug the power cable you actually get more white noise that way :p

I was just worried 'cause I really hate my speakers putting out sound that shouldn't be there, like everything to be nice and clear. Thanks for the reply :)

[MusicToMyEars36]

would this work for guitar aswell?

[valewaytechnology]

@MusicToMyEars36 Hi ... it depends where you're picking up the interference. For their low cost, it's worth trying a ground isolator anyway.

[MusicToMyEars36]

@valewaytechnology yeah i looked into it straight after i commented and thought the same thing, by the way thanks

[ROEJONO]

Do macs GET GROUND LOOP NOICE !!!!! Please i need to know

[Dreamlgider]

@ROEJONO Yes

[fazliird]

I need one of these for my laptop. I have 2 active studio monitors and they only have a choice of 2 outputs: a Jack or XLR.

How would I plug my monitors into one of these :S Use a convertor??

Sorry for such a stupid question lol

[valewaytechnology]

The isolators are stereo L/R phono socket pair one side, stereo L/R phono plug pair the other side. You can just use the L or R in/out on it's own if you're feeding a mono source.

Not sure what you're asking about the guitar and your amp?

[SROD12321]

He was saying he gets a hum from his amp. However, this device you're covering here are RCA-type imputs, and guitar amps have 3/4" inputs.

Therefore, he is asking if there is a way to attach it to a guitar amp (maybe some kind of adapter).

I have the same question btw.

[valewaytechnology]

@SROD12321 ... phono to 1/4" adapter, widely available ...

[SROD12321]

SO what input does it go in? Thats the part that has me really confused.

[valewaytechnology]

@SROD12321 Isolator sits in between your sound source and the mixer.

Output from sound card ---> isolator ----> mixer

[2strong2cool]

hi there, do you only get these with the two bits on each end? i run a cable out my headphone socket on my laptop into the aux in on my v-amp 2. i get terrible feedback and humm when i turn my gain up on the guitar, so i bought one of these things. i dont know what to do with it though, cause its got two and doesnt seem to fit my cable - can you help?

thanks :)