The big question is if you are using balanced cables or unbalanced cables. Desktop computers have mains earthed USB shield. All your gear that is mains earthed referenced will be a lot less noisy. Plug everything into the same power strip. Is anything else plugged into the modular? (e.g. I've noticed with modular even reasonably decent transformers degrading audio quality adding ugly distortion in the low end, you get what you pay for with them. It won't solve all ground loops but may well help.Įqually DI boxes won't solve all noise but may resolve some issues. If you power one of them outside this, and within this, it will break the power ground loop. I've found using isolated power supplies fixes ground loops caused by (unbalanced) audio / power. Is there really any reason to do this the hard way, and is there any disadvantage to just isolating the audio path via transformer and calling it a day? I'm also trying to factor in being able to bring my skiff to other places to perform where I don't have control over anything outside of the eurorack. It seems to me like the easiest solution for myself (and most others) is just to use a DI box or transformer isolated outputs but most people talk about fixing this problem through improving grounding paths. As soon as I connect it to my studio mixer and amp it picks up some line frequency buzz. My eurorack has a single plug going in and splits to two power supplies. (Orange "isolated ground" means the ground bypasses the "star point" at the fuse box and goes directly to the SAME ground rod as the fuse box, NOT that it is grounded to a separate rod.From what I understand it's supposed to be possible to eliminate ground loops by making sure all your gear is grounded to the same potential, but I've never really been able to make that work in practice.
#Ground isolator power strip tv
I worked at a couple radio stations where we used big LEA (Lightning Elimination Associates) boxes right where the power entered the building.Įnsure that ALL third wire grounds, even orange "isolated ground" outlets, as well as cable TV ground blocks, satellite and telephone line protectors are bonded to the SAME rod. Surge suppressors are most effective if applied at the right place, the building's main electrical service entrance. I think operations like the XM's studios do this on a grand scale.
Use a proper UPS to take the mains AC all the way to DC, float it across some storage batteries to protect against brown-outs and black-outs, then take it back to sine-wave AC. I used a 1 KVA low leakage, medical isolation transformer to deal with subborn guitar amp grounding problems with my PA rig. Between the ground block and the receiver is the right place to insert it.Ĥ. Often the tap at the pole doesn't remove every last bit of AC from the drop to your house, but a CATV isolation transformer will. Remember, those line amps the cable company uses run from AC power inserted onto the cable by large pole-mounted power-inserters.
Cable TV isolation transformer if it is connected to the stereo via a TV or FM receiver. Balanced audio paths, if possible, so that mains-to-ground leakage does not get impressed across the audio signal.ģ. Unless there's a problem, don't increase the ground leakage, and hence the audio noise, by using "filtered" power strips.Ģ. Most equipment power supplies are designed to deal with normal AC mains power.
Since most audio equipment does not use balanced connections, that means that a small part of the noise is, in effect, impressed across one side (the ground side) of the audio.ġ. Since we don't have zero-ohm, superconducting wire in the grounding paths between our audio equipment, the noise will build up a little copy of the noise across the grounds. Click to expand.The problem with using a filter to "fix" noisy power is that it ends up, in one way or another, dissipating the noise into somewhere else, like the ground or the neutral.
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