Yamaha Restio ISX-803 Audio System with Bluetooth (Brick)Enjoy a Musical Interior With a sleek stand and minimal proportions, Restio looks like a work of art. It was created by completely re imagining the concept of a music source as part of the interior. The independent body style makes music an interior design element, and because the sides are slanted, it appears to be a thin panel. The front grille uses expanded metal, providing an attractive texture. The striped pattern printed underneath the grille