Bacchus WJB-1MS-DX-AC RSM/M Electric 4 Strings Bass Roasted Maple Fanned Frets Active Electronics Sunburst

The Bacchus WJB-1MS-DX-AC RSM/M is a forward-thinking, multi-scale bass that blends vintage warmth with modern ergonomics. Built for players who demand superior string tension balance, extended range clarity, and effortless playability, this Japanese-designed instrument features a lightweight Poplar body, a fully roasted Maple neck and fingerboard, and a powerful onboard active preamp. Whether you're a progressive metal virtuoso or a studio session player, the WJB series delivers articulate tone across every fret.

Why Fanned Frets? (Multi-Scale Design)

Unlike traditional parallel frets, the WJB-1MS-DX uses a fanned fret (multi-scale) system:

• Low strings (35” scale – 889mm) : Enhanced tension and definition – no more floppy B or E strings, even in drop tunings.

• High strings (34” scale – 864mm) : Comfortable, slinky feel for bends and fast runs.

• Result : Optimized intonation, reduced inharmonicity, and a natural hand position that reduces fatigue.

Premium Roasted Maple Neck & Fingerboard

The entire neck and fingerboard are crafted from roasted Maple – a heat-treatment process that removes moisture and oils. Benefits include:

• Exceptional stability against temperature and humidity changes

• A rich, resonant midrange snap with vintage-style attack

• Smooth, dry playing feel (no sticky finish)

• Distinct charcoal-amber aesthetic that pairs beautifully with the AC (Antique Cognac) finish

Stainless Steel Frets & Bone Nut

• Stainless Steel frets : Virtually wear-resistant, glassy string bends, and long-lasting playability.

• Bone nut : Superior harmonic transfer and tuning stability compared to plastic.

Electronics & Controls – Total Tonal Freedom

The Original JB-Type pickup captures classic jazz bass growl, but the real magic lies in the active preamp:

Control Function

1x Volume Master level

1 x Balancer Blend between neck and bridge pickups

Treble (active)Boost/cut high frequencies – add snap or roll off harshness

Bass (active)Boost/cut low end – from tight punch to deep subsonic rumble

Hardware & Build Details

• Bridge : Single-string type (individual saddles) – perfect for multi‑scale intonation adjustment and isolated string vibration.

• Machineheads : Open gear type – vintage look, precise tuning, reduced weight.

• Fingerboard Radius : 305R (approx. 12”) – comfortable for both chord work and low-action soloing.

• Nut Width : 38.0mm – familiar Jazz Bass spacing, ideal for fingerstyle or pick playing.

• Finish : Durable Polyurethane/Polyester (AC – Antique Cognac / Rusted Metallic? please check dealer notes).

• Strings : .045–.105 roundwound (ready to play out of the box).

• Multi-scale enthusiasts wanting an affordable entry without compromising quality.

• Recording bassists who need clean low B definition and versatile EQ.

• Touring players – roasted Maple and stainless frets mean less maintenance on the road.

• Jazz/Fusion & Modern Rock players who love fast necks and articulate pickups.

Body Poplar

Neck Roasted Maple

Fingerboard Roasted Maple

Nut Bone

Bridge Single String Type

Machine heads Open Gear Type

Fret Stainless Steel

Pickup Original JB Type

Control 1Vo,1Balancer, Treble, Bass

Preamp Original

Scale 1st String：864mm(34inch)

4th String：889mm(35inch)

Fingerboard Radius 305R

Width at Nut 38.0mm（※）

Finish Polyurethane or Polyester

String Roundwound 045 -105

Accessories Gig Bag, Allen Wrench, COA