TM-180 is a condenser-type microphone, which is quite different from the dynamic microphone which usually being used in live performances. The diaphragm operates due to the pneumatic vibration. Inside of a dynamic microphone, the voice coil operates with the diaphragm, which increases the weight of the entire part. On the other hand, the condenser microphone incorporates a diaphragm in the either side of the electrode in an electrical part referred to as condenser, realizing a lightweight structure. This allows excellent follow-up performance, greatly contributing to high-precision sound. Thus the mechanism to convert into electrical signals is completely different between the two: the dynamic microphones are powered by electromagnetic induction to obtain electrical signals, whereas the condenser microphones take out the potential difference between the condenser electrodes as a signal. To give the condenser the electric potential difference, power supply is required.