Pioneer TS-44 Full Range Surface Mount Speakers. These speakers combine design and performance, setting a new edge against the competition. They are passive, external, 2-way speakers designed for surface mounting. The frequency response is 180 - 20,000 Hz with a sensitivity of 88 dB. They have a maximum power input of 40 W and a nominal output power of 10 W. The size is 100mm (4 inches). Package includes 2 speakers.