The Ibanez Ergodyne series (EDR series) is a series of solid body electric guitar models produced by Hoshino Gakki, introduced in 1997 and ultimately discontinued in 2006.
Special feature of the Ergodyne models is the Luthite body material, a light-weight synthetic material developed as a substitute for wood. All EDR models have a body shape reminiscent of the the S series models.
The first EDR was the EDR260. It featured Ibanez Powersound pickups and a synchronized tremolo. The EDR470 was introduced a year later and was a more deluxe version with Ibanez Axis pickups and a double locking tremolo. The most basic version was the EDR170 introduced in 2002, again with Powersound pickups and a synchronized tremolo. The EDR170EX and EDR470EX had Designed by EMG pickups.
In 2005, all luthite-bodied EDR models were discontinued. Instead, the wooden-bodied EXR170 was introduced, similar to the EDR170 but with an agathis body. The GXR370, also introduced in 2005, was another model based on the original Ergodyne guitar.
The Ergodyne series also featured several bass guitar models based on three distinctive body shades.