4 ohm impedance Power handling: 40 watts rms / 400 watts peak Frequency Response: 65-20,000 Hz Senstivity: 89 dB (1W/1m) Barium Ferrite Woofer Magnet Injection molded polycarbonate cone Double pressed treated foam surround EFF motor structure (Efficent flux field) Rigid tooled basket 0.75" mylar dome tweeter w/ Neodymium magnet | Powerbass | | PS-692 6x9" Shallow Mount Coaxial Speaker | Pair | Black/Gray | Best Buy