Speaker Size: 1 x 15” Tweeter: None Speaker Power Handling (AES Standard): 200 W RMS Frequency Responce: 40 Hz to 5 kHz Sensitivity dB SPL: 100 Impedance: 8 ohms Reflex: Rear Preamp: Solid State Amp Output Power: 250W@4ohm | 150W@8ohm Power Supply: Special Markbass Digital Power Supply Weight Kg: 15.7 kg "