Eminence Deltalite II 2510, Neodymium Woofer, Size: 10"", Power rating: 250 W RMS (500 W pgrm), Impedance: 8 Ohm, Frequency range: 60 - 4,000 Hz, Sensitivity: 97.3 dB, Playback behaviour is adapted especially for PA systems, however also suitable for electric guitar, electric bass, keyboards, guitar combos, club systems and monitors