The Ranad-Tum is a melodic percussive instrument created during the reign of King Phra Nangklao (King Rama III) imitating and complimenting the Ranad-Ek with lower pitches. Besides, the unique style for playing the Ranad-Tum was also created to be different from the Ranad-Ek style. It is played extraordinarily, joyfully, harmoniously and teasingly in accompaniment with the Ranad-Ek.
         The Ranad-Tum has three main component parts.
         1. Peun Ranad (a set of wooden musical slats) is popularly made from the stem section of a specie of bamboo soaked in the water for several months to adjust the dampness content of the wood and to prevent termite and other insect attack. Then the wooden slats are baked until completely dry, which is called Kaa Fai (left on the fire) and cut into the desired length, pierced at each ends, and tied together with a cord. The pitches are tuned by using the melted mixture of lead filing and beeswax molded into small pads and fixed to the underside at each end of the wooden slats (Luk Ranad). There are 17-18 Luk Ranad in a Peun Ranad-Tum.
         The Luk Ranad that produces the lowest pitch is about 42 centimeters long and 6 centimeters wide, while the one that produces the highest pitch is about 35 centimeters long and 5 centimeters wide.
         2. Rang Ranad (the trough stand) has a rectangular shape, functioning as the sound box. Each end of the Rang Ranad is covered by a sheet of wood called Khon. Two hooks are fixed to the inner face of each Khon for suspending the Peun Ranad above the Rang Ranad. Under each corner of the Rang Ranad there is a piece of wood attached as a base, called Tao Ranad (the Ranad foot).
         3. The playing sticks: The handle is made of mature bamboo stick with a small rectangular knob at one end for fixing the head of the stick, which is made by winding a roll of cloth around the knob until getting the desired size. Then the knob is coated with rice flour glue and tightly bound with thread for durability and beauty. Lastly the head is covered with a strip of cloth. The playing sticks or the Ranad-Tum is softer and bigger than the soft sticks (Mai Nuam) of the Ranad-Ek.