The UB2520X ultra compact sub box delivers bass in an extremely small space! The ultra compact enclosure is pre-loaded with a 10" 1000W single 4 ohm voice coil slim-line subwoofer. Considering its slim, space saving design, you will be amazed by its dynamic sound performance. Features : - 10" subwoofer size - 1000 watts max power handling - 300 Watts continuous power handling - Single 4-ohm voice coil - Aluminised IPP dust cap - Reinforced SPP cone - Nitrile butadiene rubber high excursion surround - Hyper extended rear vented pole piece - Linear cotton spider with integrated tinsel leads - Custom shallow stamped steel powder coated basket - Frequency response : 40-1000 Hz - Efficiency : 83 dB/W/m - Impedance : 4-ohm.