https://youtu.be/1WTqIz5Wklc Product Information: Our EUROLIVE B1200D-PRO 500-Watt active subwoofer provides the ultimate in low-frequency reproduction, and the built-in stereo crossover makes it ideally suited for use with any of our active 2-way loudspeakers. Packed with a powerful 500-Watt Class-D amplifier, 15" long-excursion Low-Frequency (LF) transducer and an incredible array of professional features, the B1200DPRO produces extreme levels of low-end punch, with the definition and clarity typically reserved for much larger systems! Product Features: Warranty period: 3 years High-performance 500-Watt powered subwoofer for PA applications Powerful 12'' long-excursion transducer with high temperature voice coil provides incredibly accurate and pulse-pounding bass Precise reproduction of ultra-low frequencies for "bulletproof" punch and impact State-of-the-art 500-Watt Class-D amplifier with comprehensive over-excursion, thermal and clip limit protection Built-in active stereo crossover provides high-pass filtered outputs for full-range loudspeakers Tunable and switchable Bass Boost plus Phase switch for ultimate low-frequency performance Variable High Cut control for perfect sound alignment Subwoofer Level control to adjust the balance between subwoofer and the full-range speakers Power, Signal and Clip LEDs for perfect monitoring For more information and specifications, please refer to the manufacturers website