DJ Rig Humming problem.

[mulletdude]

Hey not entirely sure if this is the place to post this but i have a really bad humming problem in my DJ Rig when its set up at home. And of course im a bit of an audiophile as well. so heres a list of what ive got in my setup in the order hooked up:
1 Numark C3 5 channel DJ mixer.
1 Behringer FBQ 3102 dual channel 31 band EQ with sub woofer output.
2 Behringer B212A speakers (12 and horns)
2 Behringer EP2000 2000 watt at 4 ohms bridged amplifiers.
2 Behringer B1800XPRO 18 inch subwoofers 1600 watts at 8 ohms.

now this humming problem has me concerned as i just got back from DJ'ing a wedding. where this hum was non existent. ive had it before and after the wedding while the rigs been set up in my house.
Any help would be appreciated. NOTE this is all pro audio gear nothing DIYed and all of it should be extremely low noise for example the mixer has 0.01% THD i believe

[imix500]

Everything plugged into the same circuit?

[mulletdude]

yes its all in the same outlet.

[mulletdude]

So let me get this straight. No one here in the DIY audio forum has 2 bits worth of knowledge about audio systems troubleshooting. Yes its all plugged into the same circuit. Yes i used sheilded ballanced lines. Yes i have checked ever connection to see if its loose. Yes i had the hum before i went to the wedding to DJ. No i did not have the hum at the wedding. Yes when i got home i had the hum again. Yes im impatient. Yes this system is what i have to survive off of. which means that if it isnt working right in my house what means it will work right everywhere else. again any help is appreciated. but i really dont have much time to waste waiting for a reply.

[wakibaki]

OK, you have a problem related to your house wiring, or the way in which you have routed your cables (unlikely), or maybe you have an intermittent ground connection in your interconnect. Did you always have the problem at home or did it just start before you went to do the gig?

Is there a safety earth in your domestic wiring? Is it 2 or 3 pin? You could check the integrity of the earth at the plug to the consumer unit at the point where the supply enters the house.

w

[mulletdude]

i believe there is a saftey ground connected to the cold water pipe. im not sure if i can legally test it without calling an electrician as im in a rented house. the wiring is all 3 pin and i use all 3 pin cabling for my power interconnects. it does sound like a house wiring problem. Does it sound serious enough that i should leave my system off and unplugged until i get the problem resolved. as i have also got a $10,000 computer and i dont want to get any of my equipment damaged. thank you for your 2 bits worth of knowledge.

[rjbond3rd]

Mulletdude, that must have been some wedding, because you woke up in the "single driver" forum.

[mulletdude]

i looked through the forums for a full system category. and figured full range was close enough. if you dont like it oh well.

[Printer2]

Originally Posted by mulletdude

So let me get this straight. No one here in the DIY audio forum has 2 bits worth of knowledge about audio systems troubleshooting.

Yes im impatient. Yes this system is what i have to survive off of.

but i really dont have much time to waste waiting for a reply.

So you are a professional? This is your bread and butter? And you have no one in town to troubleshoot your system? Also does the attitude come with the job?


So you do not have hum away from home but you do at home? Set up the system at a friends or neighbor. I know too much trouble.

So you checked the cables. So disconnect one thing at a time. Disconnect the mixer. Do you still have hum? Next the EQ, remove it from the circuit. Run the mixer into the amps. Run the output to one amp and then to the other.

Troubleshooting is isolating every piece of equipment and determining if it is the one causing the fault. You also substitute a known working piece of equipment for one that is suspect. You do not list any sources, sure you would be using them. Could they be the cause?

I am assuming the hum does not get reduced if you turn all the inputs down. Disconnect the chain. is there still hum? Short the inputs. Is there still hum.

Not really sure what you would like us to tell you. Something is wrong and you had it working previously. Isolate the problem further and we'll take it from there.

[Printer2]

Originally Posted by mulletdude

i looked through the forums for a full system category. and figured full range was close enough. if you dont like it oh well.

How old are you?