Marine 6 is a two-way loudspeaker with a 25mm (1in) tweeter and a 150mm (6in) polypropylene bass/midrange driver. It boasts an IP66 rating for incredible ruggedness when installed and is the more compact of the Marine Series loudspeakers and fits into a depth of 88mm (3.5in) with a cut-out of 200mm (7.8in).