The implication is that your speaker drivers are continuously in motion. This could cause premature aging of the speakers' mechanical components. If your speakers are dynamic cones, parts that often fail are (1) the "spider" that keeps the voice coil in proper location, (2) the thin wire that runs from the voice coil to the signal terminal on the basket could break or detach, and (3) the soft surround that attaches the outer edge of the cone to the basket or housing. Normally, these components are designed for years of use and flexing, but they do eventually fail. Some, like the surround, fail more commonly due to age than usage, but continuous usage such as you've described could shave a little time off your speakers' usable lives.