Techie help

[rhino_neil]

Sound desks and DI boxes, 

a friend has asked me to look after a band / PA that has been set up a while back as a dedicated system ie it stays in one room, but has been more than a little messed about with.  

Now when the DI box is switched on I'm getting masses of mains hum, any suggestions as to possible causes or things I can do to trouble shoot?

Thanks

Comments

[longrat.livejournal.com]

I suggest

tim at nightingale-audio dot co dot uk

:)