JBL 6.5" Coaxial Marine RGB Speakers - White STADIUM Series6. 5" Coaxial Marine RGB Speakers White STADIUM Series JBL's STADIUM Series is the luxury line, ready to create any boat into a concert experience. With a removable mid tweeter, the sound stage can be raised to accommodate the discerning musical palette. Features: White 6. 5" 100W RMS 300W Peak Written by Jon Paul of Crutchfield. A little light, a lot of sound. These high performance Stadium series 6 1 2" marine speakers combine impressive JBL sound