Pro Eighteen(r) 18 inch premium woofer * Optimized internal low-pass crossover network * 400 watts program power handling - 40 Hz - 180 Hz (+/-3 dB) - 95 dB at 1W/1m - 8 ohms * Dado jointed 3/4 inch MDF construction * Heavy-duty powder-coated metal grille * 400 watts program power handling - 40 Hz - 180 Hz (+ / -3 dB) - 95 dB at 1W/1m - 8 ohms * Pro Eighteen 18 inch premium woofer