Disadvantages
Over time the drive belt can wear or lose elasticity, and begin to slip, causing variations in the platter speed. In addition, belt-drive turntables have much lower torque; the belt can also slip off the motor and/or platter spindle, and are thus not suitable for turntablism. DJs who scratch or mix generally prefer to use direct-drive turntables.
Read more about this topic: Belt-drive Turntable