If you only hear it when you move or rock the speaker back and forth, it's probably the crossover in the bottom not being secured. Should't hurt the sound as you said.
Best way to find rattle in Talon Khorus?
I have a pair of Talon Khorus speakers and the right one has a bit of a rattle in it. I first noticed it when moving the speaker and with my ear to the speaker I hear it rattle. The music still sounds okay. I tried calling Talon but, as with an earlier thread, they seem to not be at home anymore. Weeks of calling and emailing has brought no response. I see the bolts at the bottom of the speaker and some set screws in the front, but I don't want to damage the speaker. Please help out if you have opened up your Khorus speaker.