Eminence Deltalite II 2515, 15"" Neodymium woofer, Power rating: 300W RMS (600W program), Impedance: 8 Ohm, Frequency response: 54 Hz - 3.7 kHz, Sensitivity: 99.2 dB, Playback behavior specially designed for sound systems, but equally suited for electric guitars, electric bass, keyboards, guitar combos, club music systems and stage monitors