Long throw professional speaker, pa audio system, professional audio sound equipment, pro audio sound, professional loudspeaker. RX series is designed for large outdoors performance, disco, stadium and places requiring high sound pressure.  RX12 is an array-able and flyable 3-way trapezoid speaker system. The design is extremely unique. The core of the system is the horn-loaded coaxial mid-hi section. Dual 15" (4" voice coil) serves the L/F. A 4" voice coil 250W 10" transducer is used for M/F, H/F is served by a 3" titanium diaphragm compression driver. The structure of coincidental alignment of Mid and Hi, plus the horn loading makes RX12 an effective and powerful system. To bring more tight bass, it's designed to used with RX218B, which is another unique dual 18" sub-woofer. It's a perfect combination of Vented and Reflex type of sub-woofer. It can deliver 3dB higher than Vented Type but the sound is not so "hard" as by Reflex Type. RX12&RX218B is ideal for large stadium, live shows or venues requiring high SPL, long throw.