Hi

I have just upgraded my CDJ1000 mk2s to cdj900s and have noticed that a humming noise coming from the speakers. I have swapped back over to the cdj1000's and although there is a very feint noise it isn't enough to annoy unlike when the 900's are plugged in.

I have checked for loose connections and all appears fine, I have also checked on headphones and noise is only from the speakers. When I first switch my amp on there is no noise, I hear a feint noise when I turn my DJM900 mixer on and the CDJ's but when I slide the  channel faders up the noise becomes really annoying!!

Anyone know where the problem lies?

Thanks Simon