Not every listening environment can fit a huge dual 12-inch subwoofer. The subwoofer output scale can be compromised, but in Ken Kreisel's view, distortion and speed are uncompromising, maintaining low distortion and lightning speed, and hearing the original sound of the engineer. With a 12-inch patented unit and a rated power of 300w, the DXD300A is extremely powerful despite its small size and exquisite appearance. With M150 or A50, it can be used to create a precise small theater, or used in a small recording studio under 30 square meters. 4 can also be stacked to form a subwoofer post to bring greater low frequency output.