The Ibanez EDR/EXR or Ergodyne series is a line of discontinued solid body electric guitar models manufactured by the Japanese guitar manufacturer Ibanez. Introduced in 1997 the line was notable for the unconventional Luthite bodies used rather than the usual wooden bodies. The Ergodyne series was ultimately discontinued in 2006.
The EDR170 model consisted of an Ibanez Wizard II maple neck with medium sized frets, a rosewood fretboard and an Ibanez Ergodyne headstock; a superstrat-type body made of Luthite; plastic strap buttons; two Ibanez Powersound humbuckers and a Powersound single coil pickup in humbucker-single-humbucker configuration; a volume knob and a tone knob; and an Ibanez synchronised tremolo bridge. This guitar was the simplest model available in the Ergodyne series and came in two colours: Iron Pewter and Moonshadow. The model had a five-way pickup selector blade switch which selected the pickups in five combinations: 1. The neck humbucker. 2.The neck humbucker and single coil mid pickup. 3. The single coil mid pickup. 4. The single coil mid pickup and the bridge humbucker. 5. The bridge humbucker.
The synchronised bridge is free floating meaning that a locking nut is unnecessary.