The MMF-2B uses a belt driven motor instead of a direct drive motor like the MMF-2 does. This means that there is no need for a gearbox, which makes the MMF-2 easier to assemble and disassemble. It also reduces the amount of vibration transferred through the platter. However, the MMF-2 B is not as powerful as the MMF-2 because the motor must turn slower to provide enough torque.