The Ibanez Ergodyne (EDR) series is a series of solid body electric guitar (and bass 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 a few 4 and 5 string bass guitar models which had three distinctive body shades. The Ibanez EDB series had two pickups (review) while the EDA and EDC models had a piezo bridge and a single pickup (review). The EDB is the oldest of the models. Most models were made with a man-made material called Luthite, but in 2006 they offered a wooden version of the EDB bass.
From the Ibanez Catalogs