Maybe, just maybe, the screws of my Merlin VSMs would need to be checked and retightend every few years to 17.5 in/lbs on the tweeter and 11 in/lbs for the woofer and crossever panel. Yes they come with torque ratings, not be cuase they are prone to getting loose, but the speaker is "tuned" to that torque setting. Basically worrying is mostly bogus and nothing you could not "maintain" with some help from the manufacturer - it would not be a reason to buy a speaker one way or another IMHO.
