How to eliminate AC hum on mixer?
I’ve connected my PC to the Pioneer DJM 2000 using an unbalanced mono jack to cinch cable. The DJM is connected to active monitors via XLR.
Sadly I’ve got alternation current hum on that connection and there is no switch on the DJM to disconnect the protect switch.
So what is the easiest way to get rid of the hum besides connecting the DJM 2000 to a power cable without protect switch.
you tried a ground loop isolator? (zu deutsch entstörfilter)
i bought one of these some time ago
No, I guess I’ll order one.
Are there other ways to tackle this? (besides using digital or balanced outputs which I can’t use because I don’t want to have the EIE Pro running all the time just to listen to some music).
not that i know of.. different power sources for laptop, mixer & speakers might work, but then again in a normal room in a house the electrical sockets are often chained together (at least in the old building i’m living in 
)
i have my firebox connected constantly to my MBP to listen to music & stuff.. gives you better sound results than any jack/rca cable..
balanced to unbalanced but with the pin 1 lifted on the XLR side could work. It’s a case by case thing. Digital may not solve the Ground loop issue.
I’m not going to suggest AC ground lifting even if 
Its one of my quirks. NI TA6 for DJing, Akai EIE Pro for production and recording, built-in for regular listening.
What are the downsides of AC ground lifting?
potential risk of shock hazard depending how and where it’s done & how the internal PSU are designed. Illegal in many country, but everyone do/did it in their life.
Recommended: Passive DI, isolation transformer, lifted Balanced connections.
The problem I have with the DJM800 is that the ground is via the XLR output, not the AC cable. Causes humming and little electric shocks when touching the chassis. The DJM2000 is very likely the same 
Try a dual DI box.
Get a humx. It works like a charm.
http://www.musiciansfriend.com/amplifiers-effects/ebtech-hum-x-hum-exterminator
problem is: we have different outlet sockets here in europe.. a little google search didnt come up with an EU equivalent.. there probably is one
This annoys the hell out of me. i use my on-board for listening to music, through my DDm4K. The hum/buzz infuriates me!
I’ve tried all combinations of sockets/extensions, etc… No luck.
I did read that you can use an aftermarket PSU for your laptop that DOESN’T have a groubd cable (ie - figure-8 connection and not clover-leaf connection) but haven’t been able to find one for my laptop.
Figure 8
Clover leaf
Of course - I wouldn’t DREAM of disconnecting the earth from my laptop…
Plug your pc into an outlet on a different circuit from all the rest of your gear. The humming you hear is usually harmonics caused by the fan(s) in your PC. If you consider yourself handy, you could install a circuit with a “super-neutral”, but probably easier to isolate the PC to a circuit which does not have any power amplifying on it. The humming is the current powering your fan which is running through the neutral and being amplified through your gear. Power conditioners are ok, but they mask the problem, they don’t eliminate it. Since the ground and neutral are looped together in the panel in the US on a 120 volt circuit, power conditioners sell like hotcakes. on a 210 volt circuit, the best option is powering off a different circuit.
