Soprano Standard Mahogany Models The Riptide Ukulele is made by the Boulder Creek USA Guitar Company All Standard Mahogany Series feature Mahogany tops, backs, and sides for the traditional ukulele look and tonal characteristics. The exclusive "Dual Port System" projects the sound to both the audience and the player. Moving the front sound port away from the center of the soundboard helps to increase volume, tone, and sustain on all Boulder Creek ukuleles. Die cast tuning machines and perfect fret leveling make them stay in tune and play easier than ukes costing much more.