The 540SBM is an S series solid body electric guitar model introduced by Ibanez in 1992. The S series is distinguished by the sleek double cutaway body shape which is arched on the top and back resulting in a fairly light guitar with thin edges. The 540SBM which was sold in the USA had a maple fretboard. The version sold in other markets has a rosewood fretboard. The 540SBM has a traditional bolt-on neck joint with a stamped metal plate. The 540SLTD is a similar model without the exotic top and back.