I am getting lots of ground noise from this device even though I have the grnd switch on. Any advices?
823634
I noticed it too. When the device is connected via the instrument connection the floating ground will cancel any noise. One must remember, this isn't a professional piece of equipment with layers and layers of MOSFETS, JFETS AND TRANSISTORS To switch on and of the signal. So, even though there is no signal, it's amplifying the hum from the AC transformer as well. In common terms, it needs to be connected to a device to cancel the noise. Even in the ground, or lift phase.
823635
I have not had any problems with grounding noise ... I use balanced cables for the microphone and a 1/4" cable from the mixing board to the Rolls. I would suggest trying a different mic cable and if you are plugging outputs from other powered resources (ex: amplifiers, mixers, effect pedals) into the Rolls, you may try plugging that output into a different resource to see if you get the same ground noise. Make sure all equipment that feeds into the Rolls is grounded from an electrical standpoint. If all these checks fail, then the Roll unit make be defective ....
823636
Your inputs probably have power or signal or cable issues. The Rolls boxes do not create noise, just pass it on. Rarely has any of my Rolls stuff failed in any way and I have been using them for years for stage and club bands.
823637
We've found that if you change out the 15 volt power supply to a 12 volt, with the correct polarity, the ground noise goes away.
823638
As one of the other answers suggested, I also tried using a 12v power supply. This significantly reduced the ground noise. It's a shame that this product ships with a 15v power supply that seems to be the cause of the ground noise. Actually, the device says "9-15 VDC" so maybe it's possible to use a power supply that's even lower than 12v. I'm not sure. But still there's some ground noise left even though I'm using 12v. Not nearly as bad as with the 15v, but not entirely gone either. Good enough though. Hope this helps in any way.
823639
I'm not having grounding noise issues. Are you sure the feeding devices are properly grounded?
166083
Hissing may be water inside the innards where it shouln't be. I would return it for an exchange if I were you. I hope you kept the packaging!!!! Call them first to tell them you are sending it back. This device should not make hissing sounds--loud motor noise seems to be the norm, though! --SuAnn
1549940
It's because the sound of the switch is over 65 dB because it is right next to the mic. Try sliding the switch very gently, that works for me.
2013394
I have the same issue too. I unplug it everytimenwhichmis a nuisance. If you get an answer, can you let me know too. It's going to be a year for me to of dealing with it in that manner
816092
Sorry, but the plug/iOS input jack is noisy. If you want a lower noise floor, you should get an adapter that hooks up to the 30-pin/lightning jack like an Apogee Jam.
1255825
It's should be, the noise is usually caused by different components being grounded to different areas. This should eliminate the feedback loop you are hearing.
1241026
his will not take out a bad grounding situation!! power conditioners do not do that. what your hearing is 60hz hum, meaning that the circuit in your system has started a loop, also if its audio, make sure to use only balance connections or isolation transformers! try using one outlet for your gear and make sure nothing else is sharing the same circuit
313445
sounds like it has a problem, there should be no noise coming from unit, contact manufacturer or place of purchase.
2284703
Yeh, I bought mine 10/15/08 and had the same problem.It turned out to be a ground loop between my Receiver and my Samsung TV.I put a two-prong "cheater" on the Samsung power plug and that fixed it.Not the best way, but the hum is gone.
342490
That long whistle sound pops on when power supply is not sufficient. At least from my experience. Try a much lower power draw device on it like a mini Christmas light set and see if the problem persists.
2121903
bad ground or switch??? is the face plate fully in??? there is a auto off timer in the menu. check out your manual
1688171
As Jeffrey...Yes, I have the same hissing sound on my unit too... I am from Canada, and I cannot shipping it back to the USA since It will be too expensive to do so, so I'll just keep it as is.
106627
sounds like grinding dust has entered the switch assembly. I would suggest replacing the switch.
1401261
I have not had that occur. I wish I could tell you more about what is causing that noise. It might have done so, but I had mine installed by a professional and I was not there for the testing. I have not had a power failure so it has not had to kick in either, so I haven't heard it in operation.
1003628
No, It's not normal. It's probably 60 (Hz) hum. Try reversing you AC plug, that should fix the problem 90% of the time. If that doesn't work try grounding the case.
268489
Mine does not hum, I use it as an automatic transfer switch in the living room, it's been on 24 hrs a day for a month with zero noise. I would return it and try another one.
526474
Ground Lift changes the polarity so if you are experiencing "humming", switch the lift and this should remove any un wanted noise. Coaxial inputs are to plug in an external recording devise. Hope that helps you!