Power and Portability All in One The RCF ART 915-A is a professional active speaker that combines best-in-class power and portability into one sleek package. Sporting a 15-inch woofer and a 1.75-inch compression driver, this 2,100-watt Class D bi-amplified speaker delivers up to 131dB Sound Pressure Level (SPL) and a 45Hz to 20kHz linear frequency response with an impressively smooth stereo representation thanks to True Resistance Waveguide technology. There's also proprietary RCF FiRPHASE technology, which offers superior control of phase issues that typically plague the low-mid frequency range, and Bass Motion Control technology, which limits the woofer's motion only at times of over-excursion. The result is a portable speaker with focused low-end representation across the entire stereo. Finally, the RCF ART 915-A has an M-Brace cabinet design that improves both acoustical damping and resistance to mechanical stress. Our Sweetwater A/V installation experts and live sound engineers are particularly impressed by