Deluxe Mahogany Models The Deluxe Mahogany Series is designed for the most discriminating players. All models feature Mahogany backs, sides, and tops. The model EUC-5NG features a solid mahogany top for even more tone and sustain. All Deluxe Mahogany Series models are equiped with the UK-300T preamp system with built-in tuner. (Except model UC-5BC) The beauty and playabilty of these models has to be seen and heard to believe. Do you want just another uke or do you want a Boulder Creek Riptide? That's what we thought.