These articles may be of interest. http://www.rane.com/note151.html http://www.rane.com/note110.html I have worked at the same venue for many years and have noticed more frequent problems recently with hum and buzz with some bands' equipment while most are perfectly fine. I suspect changes in the grounding such as corroded ground rod connectors or dryness in the soil they are in. The boss is investigating. I always try to run all PA and band equipment from the same circuit if capacity is sufficient. The previously mentioned 750 foot run may be a problem though with probable significant voltage drop. Cheers Roger _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user