This is a marimba from Yamaha, model YM-460/460F/410D/410/410F YM-46/41
This document is the owner's manual for Yamaha Concert Marimbas, covering models YM-460, 460F, 410D, 410, 410F, as well as the smaller YM-46 and YM-41. It details safety precautions regarding handling gas springs and instrument stability to prevent injury or damage.
The manual guides users through confirming packing contents, assembling the instrument (requiring at least two persons), and proper maintenance of tone bars made from Honduras rosewood, African padauk, or Yamaha's FRP Acoustalon material.
The instrument must be lifted by at least two persons using both hands on the frame ends.
The YM-460 weighs 55 kg (121 lbs 4 oz) and the YM-410 weighs 49 kg (108 lbs).
The YM-460/460F offers a 5-step height adjustment from 89cm at its lowest position to 97cm at its highest.