Up for sale is the Source Audio Soundblox 2 Manta Bass Filter. This thing isn't just a standard envelope filter - it's packed so full of options and even has a drive section. Compatible with the SA Hot Hand and other SA accessories. I bought this new and it's in great condition. Comes with the box, power supply, and manual. The label on the bottom is damaged a bit from me removing the 3M dual lock that was on it. $130 shipped (CONUS only). I accept Paypal, Google Wallet or Bitcoin.