Column system subwoofer 1×12 inch bass class D power amplifier, with DSP, Bluetooth output power (rated/peak): 800 W / 3200 W Frequency response: 50hz - 20khz Maximum sound pressure level: 127dB System protection: limit, short circuit, Overcurrent and overload protection 2-way XLR/6.35 mm combined input 1-way XLR output Extension and connection housing material: aluminum),2 tops+1 bass set column