Add quality sound to your spa with our deluxe Poly-Planar stereo system. This system has it all AM/FM/CD, MP3 hook-ups for iPods and other devices, custom subwoofer for deep lows and two high end pop-up speakers for amazing mids and highs. Poly-Planer Audio Systems are designed specifically for the harshest spa and marine environments. Unlike other stereo and speaker manufactures, these systems are not automotive or home units that have been ‘marinized’ – they were engineered specifically to handle the chemicals and saltwater found in pools and spas.