my speakers hum


why would my speakers hum? i just hooked up a set of speaker that hum. i've hooked up three different pair of speakers to the same system and never heard anything. any help?
dpm2340

Showing 2 responses by dpm2340

i have tried different outlets. i have not grounded to a specific point. i don't know about sensitivity between the pairs. the hum is only heard when nothing is playing.