Velodyne SPL-10 BV Subwoofer 10" in 1500 watt peak

I can demo to show it functions properly . Velodyne SPL- 10BV. I also have a set of MonitorAudio Speakers will sell (together $200.00 with sub)-- $140.00 without o.b.o Product Features • 10" (8" piston diameter) or 12" (9.7" piston diameter) subwoofer with 3" voice coil and 162 ounce magnet/346 ounce motor structure • Built-in 1500 watts Dynamic/750 watts RMS high efficiency class D amplifier • Adjustable (40 to 120Hz) low-pass crossover (defeatable) • Line-level (RCA) inputs and outputs • Speaker-level inputs with 5 way binding post connections • Signal sensing auto turn on/off (defeatable) • Variable volume control • Selectable phase control (0° or 180°) • Frequency response of 22 - 120Hz (SPL-1200) • Magnetically shielded for video use (SPL-1000 and SPL-1200) • Multiple staggered low-pass crossovers; 12dB/octave initial, 48dB/ octave ultimate • Driver Displacement Control circuit prevents over excursion and amp clipping • Blue power indicator LED • High-excursion EPDM rubber surround • Oversized spider for linearity at high excursion