This new addition to the B4 Plus AS lineup features an open-pore finish body with three colors ideally suited for this type of finish as well as a Roasted Maple fingerboard for a little brighter and punchier sound. The three new colors are Aqua Blue, Burgundy Red, and Trans Black. The open-pore body finish and the Roasted Maple neck provide a natural feel to the touch as well as enhance the tone with a more open and organic sound.



A livelier and more resonant wood than poplar, swamp ash is characterized by a scooped-mids sound with a bigger low-end and clear highs for a more balanced tone. The open-pore finish enhances the resonance even further and the wood’s natural lightweight and good-looking grain patterns are other positives of swamp ash. An ideal match for the Markbass 3-Band EQ system.

Bartolini® MK-1

The trademark Bartolini sound is preserved in the MK-1 while providing superb sound quality and value. The MK-1 delivers plenty of punchy and warm mids along with transparent and brilliant highs for a superbly balanced sound.

Markbass® MB-1

The Markbass MB-1 EQ provides a very natural and transparent boost that does not color the organic nature or resonance of the instrument’s woods. The crystal clarity and natural warmth combined exude a passive feel with smooth lows, full-bodied mids, and bell-like highs. The Markbass 3-Band EQ brings out the best acoustic nature of the bass instrument.


By treating the Maple in an oxygen-free oven at a high temperature, the wood stabilizes and develops a golden-brownish look for enhanced stability as well as a more vintage type of look and a bit bolder tone.


The emphasis of the Panga Panga and Walnut combination is on a tight and defined midrange that complements the bright and expansive tonal nature of the Swamp Ash body for an ideally balanced sound to round out the bass spectrum.


The Artisan B4 Plus AS RM features Hipshot Ultralite Tuners as standard equipment for tuning accuracy and stability.

Important Specifications:

  • CONSTRUCTION:    Bolt-On.
  • CUTAWAY:              Double Cutaway.
  • BODY:                    Swamp Ash.
  • NECK:                    5PC Panga Panga & Walnut.
  • FRETBOARD:         Roasted Maple.
  • FRETS:                    24.
  • SCALE:                   864㎜ (34").
  • INLAY:                   Abalone.
  • TUNERS:               Hipshot® Ultralite.
  • BRIDGE:                EB12(4) Bridge.
  • PICKUPS:              Bartolini® MK-1.
  • ELECTRONICS:     Markbass® MB-1.
  • HARDWARE:        Black.
  • STRINGS:             D'Addario® YB EXL165.

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more
  • B4 Plus AS OPN Artisan Series Swamp Ash 4-String Bass
  • Open Pore Trans Black
  • 2021
Fretboard Material
  • Rosewood
Right / Left Handed
  • Right Handed
Pickup Configuration
  • HH
Number of Strings
  • 4-String
Offset Body
  • Yes
Color Family
  • Tan
  • Natural
Body Shape
  • Double Cutaway
Number of Frets
  • 24

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The Gator Tone

Gainesville, FL, United States
Joined Reverb:2017

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