For some players the Electric Bass is a compromise of convenience-a substitute for the upright Bass they have to leave at home. To those players Ibanez says: "Compromise no longer!" The SR Portamento Fretless offers Bassists the comfort of their legendary SR, combined with electronics that deliver a very near-to-upright sonic experience. This cutting edge tonal flexibility is the product of two sets of extraordinary pickups: Bartolini? MK1-5's play the role of "traditional" Electric Bass pickups, while the Portamento's Custom bridge contains the "magic" of AeroSilk Piezo system that work with flat wound Strings to provide a sense of "air" to the ear that characterizes true upright sound. A 5pc Maple/Bubinga through-neck design helps fortify the sense of an Acoustic "body" for the player, and an extended fingerboard give plenty of playroom on its Rosewood, to complete the Portamento's overall upright Acoustic sensibilities.