DAW1d

I have connected only one PC (now with Toslink and USB for testing). When I pull out USB the noise disapear. When I pull out toslink nothing happened. To be clear the noise isnt too loud it is audible when I put my ear infront of tweeter or when I turn up the volume of speakers to max. So maybe it is normal "PC noise" and I am only too sensitive But when I have the volume on speakers set to 4/10 and in the room is silence (evening/night) I can hear it when I am sitting in sweatspot. I will order iDefender next week to be sure that is isnt ground loop.

I had ifi iDSD Nano and now with Audio GD NFB11 I hear almost the same noise in my studio monitors (JBL LSR 305). When I had ifi I tried iUSB 3.0 and the noise almost disapeared and iUSB havent any ground isolation. So that is the reason why I think it is some noise form PC (maybe PSU). I was trying to find solution in this thread if you want to check it. Now I am using NFB11 via toslink so it is ok, but bad thing is that sometimes I hear crackling sound. But even on AudioGD web there is info that toslink and coax isnt good interface for NFB11 and it is recommended to use USB. So that is the reason I will buy some USB "cleaner". I think iUSB 3.0 with iDefender will resolve my problem for good. EDIT.: Ok so I am confused once more. I realized I didnt test NFB11 connected via USB with headphones (ifi was silent with headphones, no noise). But NFB11 has switch to select output and when I select headphone output the noise from speakers disappear and headphones are silent too. So I really dont know from what source is the noise coming and where is it going when I am using headphones

Hello, thank you very much for review. I am dealing with USB noise for few months and this is very helpfull. I want to go with iPurifier but I think I will go for iUSB 3.0. Also do you have experience with products from Elfidelity? They are making lots of product with similar purpose: Music Hall Elfidelity USB Power Source Music Hall Elfidelity USB Boosters USB-audio interface Music Hall Elfidelity PC HI-FI Power Filter card PCI/PCI-E Music Hall Elfidelity 4 Pin FAN Power Noise Filter

Hello, I have powered speakers JBL LSR 305 and I am little bit tired of powering them every day with the back side switches. Is it safe to plug them in one wireless controlled extension power cord, leave the switch on the speakers "on" and turn them "on/off" with the power cord? And what about other devices like DAC and external volume controller? Ideally I want to leave everything switched on (on devices) and turn it ON and OFF only with one switch on the power cord. Is it possible or can I damage some stuff? Thanks.