Eminence Kappa Pro-10A, Speaker, 10"" Woofer, Nominal diameter of chassis: 10” (254 mm), Impedance: 8 Ohm, Resonance: 52 Hz, frequency range: 102 - 2000 Hz, f(s): 46 Hz, Playback behaviour specially designed for sound systems but it is equally suitable for bass guitars, keyboards, club systems, keyboards and monitors.