The RG685 is a Roadstar series solid body electric guitar model introduced by Ibanez in 1989. The Roadstar series would later become known as the RG series.
The RG685 features an ash body bolted to a maple neck with a 24-fret rosewood fingerboard with sharktooth position makers. Components include active Ibanez Lo-Z pickups with a humbucker at the bridge and single-coils at the neck and middle positions, an Edge double locking tremolo bridge with a locking nut and Gotoh tuning machines.
It has a master volume and two other knobs which control separate EQs for treble (±20 dB @ 6 KHz) and bass (±13 dB @ 500 KHz). It also has a mini-toggle which connects the bridge humbucker directly to the output jack — Ibanez calls this feature the "kick off switching system".
The RG678 is a similar model with passive pickups.
The RG685 was available only in Japan and was discontinued after 1989.