Celestion BL15-400X Green Label Bass Speaker - 15" 400-Watt Ceramic 8 ohm Power handling: 400WSize: 15"Impedance: 8ISensitivity: 96dBFrequency range: 40Hz-3,500HzDepth: 6.4"Weight: 10.8lb. Characterised by an extended low end and greater linear excursion, Green Label speakers push out every note with a rich, warm tone and a powerful low-end thump Green Label speakers are primed for high-powered rock performances, where a full-bodied, warm, defined tone is essential