I bought the chair in front ca.2jahren and operate it for a year with 6 body sound transducers (4 bass bumpIII and 2 Big bass pumping from Sinuslive with total 800watt max.) And the chair has no damage suffered despite more than extreme vibration every day! only the screws I had to replace at the beginning, because the thread is ausgerrissen by the vibration I empfehele to stainless steel screws. with one exception of the adjusting lever of the chair which I have just secured with a cable tie to the bracket of the armrest in wood no tears or wobbly parts, thus nothing wobbles more. In addition, the chair is extremely comfortable - you can even sleep on in - and perfect for extended gaming sessions with friends. No back pain, not numb legs, nothing. Absolute buy recommendation on my part!