Boss Audio MR690 6" x 9" White Oval Speakers - MR690 Water Rescue Device the machined shaft and backing

the machined shaft and backing plates resist deformation under load and simplify future adjustments or replacement

Raymarine recommends using no more than two (2) extension cables in any given cable run

Operating Temperatures - -20 to 80°C (-4 to 176°F)

and diagnostic error codes

Width 2 1/8" (54mm)

Boss Audio MR690 6" x 9" White Oval Speakers - MR690 Water Rescue Device the machined shaft and backingBoss Audio MR690 6 x 9 White Oval Speakers MR690 Boss Audio MR690 White 6 x 9 Oval Marine Speakers Boss Marine Loudspeakers are designed to withstand the harsh conditions of the marine environment. All frame and grill sections are made of a polymer composite that is completely waterproof with a coating to protect against damage from UV rays. We use rubber surrounds and polypropylene cones to complete the waterproof package. The tinsel leads are coated