M2-10HBCLASS LEADING OUTPUT The M2WL 10H and M2WL 10HB models are marine grade 10" full range horn loaded drivers engineered specifically to be BIG and LOUD! We're not kidding our very own product development brief states: "Rockford Fosgate developed the 10 inch horn loaded drivers to be the loudest marine driver on the market." The frequency response is uniquely tuned for "open air" environments, so you hear the detail in your music the way it was intended