Ibanez RG8570-RBS — J Custom Series Electric Guitar with Case

The Ibanez RG8570-RBS exemplifies the pinnacle of Ibanez’s J Custom craftsmanship. Hand-built at the FujiGen factory in Japan, this instrument combines exotic tonewoods, precision hardware, and boutique electronics. Featuring a meticulously selected Korina body with a bound flamed maple veneer, a three-piece S-TECH WOOD–treated roasted maple neck with an ebony fretboard, premium DiMarzio True Velvet and True Single pickups with coil-splitting, Gotoh J Custom hardware, and a multi-step Red Burst Sunburst finish, it ships in a custom-molded J Custom hardshell case. This 2,000-word overview dives into every aspect—from wood selection and construction to electronics, hardware, finish, ergonomics, sustainability, care, performance applications, and dedicated quality assurance—culminating in a detailed white-and-gray specifications table.

1 | Tonewood Selection & Body Craftsmanship

The RG8570-RBS body is crafted from lightweight American Korina, prized for its balanced tonal response and vintage-inspired warmth. A bookmatched flamed maple veneer is bound to the top, accentuating visual depth and enhancing resonance. Comprehensive chambering reduces body mass without compromising structural integrity, yielding a comfortable weight for extended play. CNC precision routing shapes ergonomic contours, including deep bevels for chest, forearm, and belly cuts, refined by hand-sanding to deliver seamless comfort for performing artists.

Korina’s midrange clarity combined with maple’s brightness creates a versatile tonal foundation—punchy lows, articulate mids, and shimmering highs—that thrives across musical genres. The bound maple top not only adds aesthetic elegance but also contributes to the guitar’s harmonic richness and sustain.

2 | Neck Construction & Roasted Maple Treatment

The three-piece neck is constructed from roasted maple using Ibanez’s proprietary S-TECH WOOD process. Through controlled thermal cycles, internal moisture evaporates and wood stresses are relieved, resulting in enhanced stability and minimal seasonal adjustment. Roasting increases wood density, amplifying sustain and resonance. The profile is the signature J Custom "Jumbo," with a generous heel taper and a comfortable shaft that transitions smoothly from lower to higher registers, supporting both complex chord work and lightning-fast runs.

The satin-finished roasted maple neck feels instantly "broken in," offering a smooth, tactile surface. Its amber-hued patina deepens over time, reflecting the instrument’s age and character.

3 | Ebony Fretboard & Extra-Jumbo Stainless Frets

A bound Macassar ebony fretboard provides a luxurious playing surface with tight grain and a rich, focused tonal palette. Ibanez installs 24 extra-jumbo stainless-steel frets, chosen for their hardness, corrosion resistance, and bright attack. Each fret undergoes meticulous hand-leveling, crowning, and polishing to eliminate sharp edges and ensure consistent intonation. Abalone side-dot inlays offer subtle guidance under stage lights, while fret end treatment prevents tangs and ensures smooth hand transitions.

4 | Premium Electronics — DiMarzio True Velvet & True Single

The RG8570-RBS features a high-output DiMarzio True Velvet humbucker at the neck and bridge positions, delivering a warm, snappy tonal response with vintage clarity. A True Single-Soapbar in the middle position provides articulate single-coil chime. Push-pull tone controls on both volume knobs split the humbuckers into single coils, offering a staggering array of tonal options. The five-way blade switch engages all standard and mixed configurations, while individually shielded pickup cavities and premium wiring ensure a pristine signal with minimal noise.

5 | Gotoh J Custom Hardware

At the bridge, a Gotoh J Custom fixed bridge with stainless-steel saddles and brass string ferrules maximizes sustain and stability. Gotoh SG501 locking tuners, with an 18:1 gear ratio, secure strings at the post for rock-solid tuning and facilitate rapid restringing. All hardware components are polished chrome-plated, complementing the guitar’s high-gloss finish and resisting corrosion over time.

Specifications