Personaly i wouldnt worry about it to much, most high wattage amps generate a hum, you will probably find once the music is on you cant hear it.
worked in night clubs for about 5 years, then worked for a national company called Stage Electrics,, who hire out everything, and stage events etc..
there PA rigs hummed.. so long as your are confident all the connections tight and nothing is short circuited, i wouldnt worry too much.
we used to pick up the local taxi company through the sound system at the last night club i worked in.
Just check the socket outlet is grounded, etc or are the speaker cables running close to any mains cables.
[This message has been edited by PaulCornwall (edited 10-23-2003).]
