Ibanez S721RB-BKF

Ibanez S721RB-BKF review

The Ibanez S721RB-BKF is an Iron Label guitar with a clear emphasis on metal. Its matte black finish, black hardware, two passive humbuckers, and fixed bridge all point toward a straightforward high-gain setup. In use, the sound and feel support that impression, with strong output, defined lows, and a neck designed for fast, comfortable playing.

The S-series body is notably slim and light, according to hands-on feedback, which helps make the guitar comfortable to wear through a long set. A five-piece maple and walnut neck is bolted to the okoume body. The Wizard III profile measures 19 mm at the first fret and 21 mm at the twelfth, with a 305 mm fingerboard radius. That combination makes for a flat-feeling playing surface and a narrow, quick neck rather than a rounded, substantial grip.

Neck and hardware

The ebony fingerboard carries 24 jumbo frets across a 648 mm scale. Nut width is 43 mm, and the nut is made by Graph Tech. These dimensions suit players who want room to move across the fretboard without a short-scale feel. The reverse headstock is also noted by the owner, who found it useful for balancing string tension while tuning down to Drop B with a 12, 60 string set.

Ibanez fits the guitar with a Gibraltar Standard III bridge and Gotoh MG-T locking tuners. There is no tremolo, which keeps the bridge setup simple and gives the instrument a fixed-bridge configuration. The locking tuners are a practical match for players who change strings often or use alternate tunings, though the provided feedback does not establish a specific tuning-stability test.

The finish is called Black Flat, and the blacked-out look is consistent across the body and hardware. The owner describes the finish as tidy overall, while noting that the level of refinement falls short of higher-end Prestige or PRS instruments. That is a useful qualification at this price point: the guitar looks purposeful and well put together, but should not be mistaken for a boutique-level finish. Matte black surfaces can also show handling marks, as the owner observed.

DiMarzio D Activator pickups

The two DiMarzio D Activator humbuckers are the defining part of the S721RB-BKF's sound. They are passive, so the guitar does not rely on a battery for its pickups. The owner expected a more conventional voice but found the output notably strong, with substantial bass response and clear treble. Compared with their previous experience using EMG 81 and PRS 85/15 pickups, they found the D Activators particularly suited to metal.

Volume and tone controls are paired with a five-way switch, offering more than a single fixed high-gain voice. The feedback highlights the pickup response rather than detailing each switch position, so it would be unwise to assign specific sounds to settings without testing them individually. What is clear is that the guitar can produce a forceful, sharply defined signal. That precision is an asset for tight playing, but it exposes unwanted string noise and accidental contact. Players who mute inconsistently may hear those mistakes plainly.

Who should consider it?

The S721RB-BKF is a focused choice for a guitarist seeking a slim, light-bodied instrument with passive pickups, a fast neck, and a fixed bridge. Its owner found it worked especially well in a Drop B setup, and the D Activators delivered the authority and clarity they wanted for metal. The same clear response asks for clean technique, so players looking for a forgiving, soft-edged sound may prefer a different pickup character.

One practical limitation concerns wireless transmitters. The owner found that small plug-in wireless units did not fit the guitar's recessed jack as supplied. They used rubber washers to bring the jack outward slightly, avoiding a strap-mounted extension cable. This is a specific compatibility issue worth checking before purchase if a compact wireless system is part of your live rig.

Listed at 943, the Ibanez S721RB-BKF offers a distinct combination of an all-black finish, passive high-output humbuckers, and a comfortable S-series build. The feedback is strongly positive on its metal tone and playability, with finish refinement and jack clearance as the notable caveats. The guitar is supplied without a bag or case.