Tested the speaker and turns on plays for about 30 seconds then shuts off.  I was going to see if I could fix the short but now just priced to sell.  Worked great for years and now for some reason powers on then off.  PRICED TO SELL AS IS 

This Velodyne DD12 subwoofer amplifier from the Digital Drive series is a powerful addition to your home audio system. With a driver size of 12 inches and RMS power of 250W, it delivers high-end audio quality that will blow you away. The cube-shaped subwoofer comes in a stylish brown color, measuring 15 inches in length, 14 inches in height and 14 inches in width, weighing 40lbs.

It features multiple audio inputs including AUX, stereo L/R RCA, banana jack, and 3.5mm jack, making it easy to connect to your audio devices. The subwoofer has an impedance of 12 ohms, and comes with wired connectivity. The Velodyne DD12 subwoofer amplifier is a great choice for anyone looking for high-quality audio without worrying about the condition of the product.