Spectron: DC offset can harm your tweeter, depending on the tweeter design and degree of DC Offset
Simon, can you clarify why that would be? I would expect any reasonable amount of dc offset to be blocked from reaching the tweeter by the capacitor(s) in the speaker's crossover network. Aside perhaps from transients during turn-on and turn-off, or during times when the amount of dc offset might be changing, and in each of those cases I would expect the resulting transients to be minor and brief.
Thanks!
-- Al