The Beta Three® CSR212A Cinema Series loudspeaker is a surround two-way mid/high horn loudspeaker designed and engineered to meet the demanding requirements within Digital Cinema installations where high quality music and vocal reproduction is essential.@ Two transducers two way full range. High SPL, high sensitivity. One 12" big power woofer. One compression driver with 44mm PEI diaphragm. Built-in electronic protection crossover. Computer simulating design provide very good Frequency response and phase feature. Very convenient walling installation mode. Suitable for THX, DTS and other multi-channel surrounding sound reinforcement in cinema. Suitable for Mid/small cinema audio system. Can work with Beta Three high energy bass speaker when used for high quality music replaying