Phase Technology PC-SUB WL12 GB Wireless SubwooferPhaseTech PC SUB WL12 GB (Wireless 12 inch Subwoofer) in Black Gloss Finish 12 inch Wireless Subwoofer w Passive Radiator. The combination of an audiophile sub with wireless, uncompressed, streaming audio inputs makes the PC Sub WL series one of the most versatile subs on the market. Featuring a 12 inch downward firing active woofer and front firing passive radiator in a stylish gloss black cabinet, the PC Sub WL 12 II is capable of up to 2. 5 inch of