DD Audio 9918 D0,5The 9900s are the go to subwoofers for the demanding bassaholic with a profound interest in physics. Entertaining minds will revel in the endless system design possibilities deliverable with these precision low frequency devices. Originally coined The Beast, the 9900s first appeared on the market in the early 2000s. It took a brief hiatus, but now its back and more beastly than ever. The latest iteration was developed in response to the recent