My worry was not about the electronics and the amount of power being sucked in, but actually (and likely simplistically) about mechanical wearing off of the driver membranes, given the constant movement to make that noise.Yes, that was understood. The very low volume, and the correspondingly miniscule amount of power going into the speakers, are indicative that the amount of movement is vastly less than the tweeter is designed to handle, given the reasonable sensitivity of your speakers (87db/1W/1m). I don't see any cause for concern.
Regards,
-- Al