dBTechnologies OPERA P15 is a passive speaker studied for the sound reinforcement of medium to big environments; it offers the possibility to obtain high sound pressure while maintaining a linear frequency response. The speaker is equipped with 15” woofer (3” voice coil) and 1” compression driver (1.75” voice coil) loaded with 80°/65°x60° asymmetric horn. The OPERA P15 has passive crossover filters with a slope of 12dB/oct for the low-pass part, 18dB/oct for the high-pass and a self-resetting thermal protection circuit (PTC) on the driver to prevent protracted overloading. The OPERA P15 has a nominal input impedance of 8 ohms.