Over 25 years ago, the SR established Ibanez as the leader in innovative bass building. Throughout the years, we've made fretless versions of this classic for a limited number of Ibanez artists. Now, The Ibanez Bass Workshop makes this much sought after option available to SR players everywhere with the introduction of the SR Portamento. The SR Portamento offers a Rosewood fingerboard that extends the length of the standard SR neck to a hefty 30-fret length. Several years in the making, the SR Portamento's new AeroSilk piezo system delivers an uncanny touch of hollow-bodied openness, and realizes the Upright Double Bass sound to blend into the mix that both inspires and redefines the role of the solid body bass.