AV LinkGround Loop Isolator

I admit that after the reviews I didn't give much chance that this device would work, but I had to try before the whole thing was to be dismantled. I did a pro audio upgrade, Pioneer xbt9600 radio plus sundown salt amplifier for door speakers and sundown tweeters, sundown signal cables, lot 200ah, modified alternator and many many more. I start the car and it hums loudly with increasing engine speed, I'll take a chance. And I'll say it works! It completely eliminated the noise and didn't worsen the quality at all! The music still plays as it should, so either people connect it incorrectly or they use low quality equipment

WOW!The joys of being able to enjoy my new studio monitors with my laptop without terrible processor noises.For those that are interested am using a Sony Vaio laptop (would want a desktop but am a university student!) with studio spares SN10 speakers powered by an Alesis R150 amplifier (cheap setup). I am running these though a Creative labs external USB 5.1 sound card which is another great product.The problem arose only when I connected my 24" Samsung to my laptop where I suffered terrible high frequency processor noise when I changed the volume/played a song - Ground loop issues. I though this product wouldn't work as it was so cheap, so initially opted for a power conditioner (£25) which didn't work, but removed other low fq buzz.Gave this a go and it worked a treat.Defiantly worth the money for a laptop set up or if you are playing music through your speakers from a device that is earthed to the same power source and you have troublesome noise in your mix.A fiver is worth a punt!

Having browsed through the reviews here before purchasing, I wasn't expecting this to do the job adequately, or at least to maintain the excellent sound quality that I'm used to. My aim was to eliminate or at least minimize the ground loop hum that I was getting as a result of putting a (very high grade) graphic equalizer between my DAB radio and CD player on the one hand and my powered speakers on the other (with a long lead to those speakers).In the event, when I connected the device initially to the radio's output, I was amazed to find that the hum and indeed a certain level of hiss had disappeared, apparently completely. However, later that afternoon I found that a certain low level of hum had returned, and so I then carried out various experimental connections to find out in what circumstances I got hum / hiss. I eventually found out that a good part of the problem was crappy XLR - RCA adaptors that I was using to connect my input and output devices to the equalizer; they all were a loose fit at both ends and so causing hum to come and go. However, that aside, I also found that even when I couldn't hear hum, if I had the equalizer's bypass switched on, or if the equalizer itself were switched off (which also results in bypass), the hum returned, albeit not very loud.What I concluded from all this was that my particular setup needed more work than just fitting one ground loop isolator, and ANY such device would have a similar limit on effectiveness if I used it in the same way, so it didn't make sense to blame the isolator as some reviewers here have done. I researched around and arrived at a more secure arrangement. Rather than continue with this particular device, which has very low-grade cables / connectors, I bought an ART DTI, which also served as an adaptor connecting both my radio and CD player into the equalizer (using appropriate high-grade cables of course), and also using high grade XLR - RCA connecting cables for the equalizer output, so dispensing altogether with the crappy adaptors. With this arrangement there is just a very low level of hum, and once I've got a booster for the signal from the radio and can then use lower gain on the output to the speakers I should find that I do not notice hum under any circumstances, even though it is actually still just there.So, although I have not continued with this particular device, it was clear to me that, given the right circumstances, it could work very well. Also, I didn't notice any degradation of sound quality on my Audioengine A5+ speakers. Both bass (right down to the limit of hearing) and treble subjectively seeming to be untouched. Inevitably the device did reduce the signal level a little, but not to a problematical degree. I still think, though, that if you have a really good system you are likely to be better off long-term with something like the ART DTI, for it would have higher grade components, both externally and internally - but then of course it's a matter of how much you're willing to pay for that greater quality and thus security.

I am sure that I am not alone.Dug an old turntable out of the loft a few months ago. Connected it up to an amp. Hummmmmmms like mad!!!!So, eventually, I thought I would do something about it. After a cursory search for the OEM ground loop cable failed to turn that up, I went looking for something where you find everything - Amazon.And here it was. Plug this in line in to the RCA cable and hum gone ... or NOT!It may have very marginally lessened the hum, or may be I was just hoping. It did, however, meet my expectation.There was a clue 'ground loop' ... and nothing about this is, errr, grounded!So, in short, it does not do what it says on the tin. No appreciable reduction (in fact probably none at all) in the hum.Amazon just refunded. Didn't even want it back. Inquisitive, I thought I would have a look in side. 2 copper wound mini induction/transformer loop type things on a PCB of sorts.Utter junk. Save your carbon footprint and buy something that creates a ground loop connection!