The motor is attached to the frame at one end. The hinges for the damper bar are attached at each end, and the spring assembly and the pedal are usually aligned in the middle. Two banks of resonator tubes are laid into grooves in the frame so that they straddle the damper bar. The resonators are not firmly fastened to the frame. The ends of the shafts that gang the disks are connected to the drive of the motor through a drive belt similar to an O-ring.