The S1XXV 25th Anniversary is an S seriessolid body electric guitar model offered by Ibanez in 2012. It was created to commemorate the twenty-fifth anniversary of the S series and as a tribute to the original 540S Saber. The S1XXV was produced in Indonesia.

The S1XXV features a mahogany body bolted to a maple Wizard III neck with a 24-fret rosewood fingerboard with dot position markers. Components include Ibanez Infinity pickups with a pair of humbuckers mounted in pickup rings flanking a direct-mounted single-coil and a ball-bearing pivot ZR double locking tremolo bridge with a removable ZPS2 tuning stabilizer.

The S1XXV was offered in two fluorescent colors: green and yellow. The headstock and fretboard inlays match the body color. It was also equipped from the factory with color-matched DR Hi-Def Neon strings.

Other twenty-fifth anniversary guitar models were the RG1XXV, RG2XXV and the RG3XXV. The RG1XXV differs from the others in that it was produced in the factory which produces the Premium series; the others including the S1XXV were made alongside the standard Indonesian production.