EARTHQUAKESound GLI-200 Hum and Buzz Kleaner 600 Ohm RCA in/Out Ground Loop Isolator

Used on full bandwidth speakers, APC S20, AVR and 1000W amp. Works great with a caveat; I needed to ground the AVR to the UPS otherwise it will sound worse. Without this device, grounding the AVR and amp to the UPS in any combination does not work. This might be one of several devices or things you need to do to eliminate ground loop and noise.Aside from that, it also reduced amp hiss and eliminated active HDMI cable noise. It works so well that you think some audio signal is lost. But before and after room calibration result is inconclusive, bumping up 16kHz and reducing 500Hz one dB, were the largest difference.

I was optimistic that this device would remove the RF or hum associated with my turntable set up based on all the good reviews. My set up is as follows: Technics TT to Vincent tube pre-amp out to Tube equalizer out to Tube amp and finally out to AV receiver.Once installed, I noticed a loss in audio fidelity including bass. When I disconnected a reverted to my standard set up without the Earthquake, volume was louder, bass returned. The RF noise/hum was present with or without this device and really noticeable at high volume like 50db so it really didn't do anything except lower audio fidelity. Not sure why. I attempted setting up earthquake between TT and phono pre amp and got the worst noise, They I set up between phono pre-amp and equalizer and although audio passed through, fidelity was lost and apparent. Then I set up between tube amp and AV receiver, and same result with a loss in fidelity. Note that I have installed my internet router and internet connections as far away as possible from turntable and amps buy somehow get this weird RF signal.So the saga will continue for me. I will surely appreciate any tips!

I've been chasing ground loop buzz issues in my media system, which are no doubt self-inflicted due to my overcomplicated setup (computer source feeding a Denon receiver via HDMI, splitting out to vintage amplifiers via zone 2 RCAs, through RCA to XLR cables, to active crossovers, to ML electrostatic speakers). None of the speakers that are powered off the Denon receiver itself have noise that I can hear, only those powered by external amplifiers.I had previously used star grounding on all the RCA shields to the receiver chassis ground, and moving ALL equipment to the same wall outlet, which helped some, but not all of the problems (got rid of flourescent and LED bulb noise from other outlets/breakers in the house just by consolidating the audio/computer equipment to a single outlet). Ultimately, the noise was coming through the HDMI from the computer to the receiver, and then being passed to the amplifiers.This product solved 90-95% of the processor power noise passing through the RCAs to XLR inputs on the outboard crossovers. I'm still going to obsessively chase down the last bits of noise reduction, but all in all, this product is worth it's price and then some

I bought this earthquake sound ISO-200 box to try and eliminate ground loop hum at 120 Hz. I knew the hum was likely due to my PC graphics card or a DP to HDMI cable output to myTV, but even without the PC to TV HDMI connection, I still got hum. Anyway, this box will convert your RCA input to XLR and it works, but the ground loop isolation is not that good. I still heard a 120 Hz hum (though not as bad) with my PC on, and I was only able to fix it by buying a more expensive RCA to RCA Jensen Iso-Max CI-2RR RCA Stereo Line Input Isolator Hum Eliminator from Parts Express. There were situations when I tried to use the PC to TV HDMI cable where the earthquake sound ISO-200 actually amplified the hum.I don’t know why amazon doesn’t sell the Jensen Iso-Max CI-2RR (I couldn’t find it anyway), but with it there was like almost 0 noise coming from my speakers when i used it with two sets of 1.5 ft cables, and that’s with my ear right next to the speaker listening for hum.

This looks and feels very high quality. Being able to use your own RCAs in AND out is a huge bonus if your install is visible.I was having a TON of buzzing through all speakers after installing a Dayton DSP-408. I tried getting better grounds on all my amps and even other things in the car but nothing worked. After installing this in-line with the DSP's INPUT RCAs, nearly all the buzzing vanished. There's still a very high pitched buzz, but this product worked better than I expected.I'd suggest giving this a try.

So I built myself a new PC recently for the first time in nearly 10 years. Sound Cards seem to have gone the way of the buffalo so I was looking for a solution for setting up my KRK Rokit 5 Studio Monitors. I spent more than I wanted to on a Mayflower Electronics DAC/AMP and had some issues with it straight from the box. I sent it back to them, and in the meantime connected them straight to my onboard PC audio. I instantly had terrible hissing and whining coming from my speakers--no matter what cables I used. I've had this issue before, mostly with car audio, and have in fact tried a few ground loop isolators before with little success. I took a chance on this with very little faith it would do anything.Well, wouldn't you know this took all my noise away! I was really surprised at how well this worked. One of the few times I went against my intuition and was proved wrong. A great product!

This did nothing to eliminate the hum and buzz I was getting. It made everything worse.

Despite grounding, I have a hum/buzz between my Pro-Ject Tube Box S2 and Onkyo AVR. Unbalanced RCA connections. I installed the loop isolator and noise was completely gone. I was surprised and happy because a lot of products just don't work so well. The next day, I was ready to use my system, and the hum/buzz was back. I checked all the connections, relocated the loop isolator, etc., but nothing worked. Perhaps a better grounding system is needed. However, I will continue to trouble shoot and update this review as necessary.