The Radian 5215B coaxial loudspeaker brings the best of 2-inch compression driver technology together with an excellent high performance 15-inch low frequency transducer. The 5215B utilizes a 4-inch voice coil for the low frequency transducer and a full 3-inch voice coil in the compression driver.   This transducer system is capable of producing extremely high SPL, 127 dB continuous. This output is achieved over a bandwidth of 45 Hz to 20 kHz with 5 dB down points with 130 dB peak output levels. Applications for the 5215B include demanding sound reinforcement main and monitor systems, and high ceiling convention center/ballroom installations where high SPL transducers are required.   The 5215B are normally equipped with an 8-ohm woofer and 8-ohm compression driver. A 16-ohm compression driver impedance is available on order.