The REV6X9SM is a 6x9 HLCD speaker enclosed in a durable marine-grade surface mountable housing. Available in a BLACK or WHITE Roto-Mold housing. They feature a High Output HLCD compression driven 6x9 speaker that will deliver amazing sound throughout your boat, ATV, Golf Cart or most any application! The REV6x9SM is the perfect speaker system for installation under the gunnels on larger off shore boats as well. Providing amazing output and full sound everywhere in the boat with no visible speakers. For under gunnel use, minimum 7" width is needed for placement.