The RX series is a line of solid body electric guitars produced for Hoshino Gakki and sold under the Ibanez brand. The initial RX models were introduced in 1994. The RX line essentially replaced the earlier Korean-made EX series.
The RX models are more affordable variants of the venerable RG series, originally produced in Korea and later in Indonesia and China. Unlike the RG, RX models have 22-fret necks and simple, non-locking, synchronized tremolos.
With the introduction of the entry-level GIO line of in 1998, the RX series has been moved under that banner and known as GRX models (with the "G" for GIO). These models are all considered to be a subset of the RX series.
The RX series was introduced in 1994 as an affordable entry-point into the RG series. They were positioned both for affordability and also to appeal to those who want a more "traditional" instrument without the complexity of double-locking tremolos offered in the more expensive RGs. As such, the RX is well suited for country-western and blues.
The RX series also feature 22-fret necks which allow the neck pickup to be positioned further from the bridge, resulting in warmer, fatter tones. This wider pickup positioning also alters the tone of the split pickup positions (lever positions 2 & 4).
At its introduction the line offered dual-humbucker (RX20), HSS (RX160) and HSH (RX170 with rosewood fretboard, RX170 with maple fretboard RX270, RX350, RX650 and RX750) pickup configurations as well as a 12-string model (RX352).