Marē 5 - Masterbuilt by Belforti, custom high end boutique bass guitar with premium tonewoods and bespoke hardware
About this bass

The Marē 5 Masterbuilt is the upper limit of what Belforti builds — a five-string bass conceived without compromise, where every specification is chosen for maximum musical and visual impact. It is not a configured instrument. It is a built one.

The ash body is topped with a tamo ash cap of exceptional figuring — its wild, swirling grain patterns reading almost like a topographical map across the surface of the instrument. Under a clear gloss coat, the natural cream and amber tones of the tamo shift and move with the light, making this one of the most visually striking tops available in boutique lutherie. A maple neck and rosewood fretboard complete a classic, proven pairing — warm, fast, and immediately familiar under the hands. Rounded block inlays set into the rosewood add a refined visual detail that anchors the instrument's premium positioning without overstating it.

Electronics are handled entirely by Aguilar — AJ5 HOT pickups feeding into an OBP-3 three-band preamp. The pairing is deliberate: the HOT pickups push harder and wider than a standard passive design, and the OBP-3 gives the player surgical control over the full frequency spectrum. Bass, mid, and treble controls respond with the transparency and musicality that Aguilar is known for — shaping tone rather than imposing it.

The Marē 5 Masterbuilt is a commission instrument. The result of a single conversation between a player and a luthier, built once, built right.

Each of our instruments is carefully handcrafted in Paris, France, using the highest standards of craftsmanship and the finest materials. At Belforti Instruments, we focus on precision and quality to create durable, high-performance guitars and basses that meet the needs of serious musicians. Every instrument is a testament to our commitment to exceptional sound and design

Marē 5 - Masterbuilt bass guitar headstock, Belforti custom boutique high end design

Features

Marē 5 - Masterbuilt high end bass guitar by Belforti, custom boutique design with premium tonewoods and bespoke hardware.

Shape

Marē 5 - Masterbuilt bass guitar by Belforti, showcasing custom boutique design and high-end features.

Core Specs

Stacks of various tonewoods, showcasing a selection of high-quality wood for musical instrument construction used at Belforti Instruments

Woods

Marē 5 - Masterbuilt boutique bass guitar back with select tonewoods by Belforti, custom high-end craftsmanship.

Options

Marē 5 - Masterbuilt by Belforti, custom boutique high-end bass guitar with premium tonewoods and bespoke hardware

Tamo Ash

Tamo ash — Japanese ash — produces some of the most dramatic figuring found in any tonewood. Its defining characteristic is a dense, turbulent grain pattern that swirls and folds across the surface in tight, unpredictable formations, creating a visual effect closer to abstract art than conventional wood figure. No two tamo tops share the same pattern, and highly figured pieces are considered among the most sought-after cap materials in boutique instrument building. Tonally, it contributes the brightness and definition characteristic of ash family woods — clear, present, and well-articulated across the full frequency range.

Lovely Curves

Masterbuilt Series tops are bent on the armrest which keeps intact the beautiful grain as well as creating an ergonomic and delicate curve to rest on.

Electronics

Masterbuilt instruments feature advanced electronic designs and premium pickups from some of the finest manufacturers in the world. Their circuitry is conceived for power, precision, and tonal versatility — not limited to any particular style, but capable of handling them all.

Depending on the model, you’ll find active systems on basses, expanded tonal controls, and refined wiring layouts that provide exceptional clarity, responsiveness, and creative range.

Pickups
  • Aguilar AJ5 HOT

The AJ5 HOT is Aguilar's high-output take on the classic J-style pickup format, voiced specifically for five-string instruments. Wound hotter than a standard passive design, it delivers a stronger fundamental, a more pronounced midrange presence, and a fuller low-B response than conventional J pickups — without sacrificing the clarity and note separation the format is known for. It pairs naturally with active preamps, responding to EQ shaping with precision and musical transparency.

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Circuit

Preamp

Aguilar OBP3

TheAguilar OBP-3is a high-performance3-band active preampdesigned to deliverpowerful, flexible tone shapingwith ultra-low noise and crystal-clear signal clarity. Known for itsmusical EQ responseandhigh headroom, it allows bassists to sculpt their sound with precision, from deep, punchy lows to crisp, defined highs.

Layout

  • Volume
  • Volume
  • Bass / Mid /Treble
  • Mid Switch

What's included

Your instrument

How surprising !

Belforti Premium Gig Bag

Your Belforti deserves proper protection. So it comes with a signature padded gig bag themed after the series you chose.

Sturdy, weather-proof, and oh so cool !

Setup Tools

Your instrument comes completely setup and ready to play. But you might wanna tweak things up a bit later on, so we got you covered !

Certificate of Authenticity

A real Belforti deserves a certificate. Can't fake this up

Detailed Specs

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GENERAL SPECS

Body Shape : Marē

Number of Strings : 5

Scale Length : 34"

String Spacing : 18mm

Weight : 3.7kg

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TOP, BODY, NECK & FRETBOARD
  • TOP

Top : Tamo Ash

Contrast Layer : Black Maple

  • BODY

Body Wood : European Ash

Body Wood Rating : 88.26R

Chambering : Non Chambered

  • NECK

Neck Wood : Norwegian Maple

Neck Wood Rating : 82.84R

Neck Profile : S

Nut Width : 39mm

  • FRETBOARD

Fretboard Wood : Indian Rosewood

Fretboard Wood Rating : Indian Rosewood

Fretboard Radius : Modern 12" to 16"

Number of Frets : 24

Fret Wire : Jumbo Stainless Steel

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FINISH

Body Finish : Ultra Thin Matte Polyurethane

Neck Finish : Ultra Thin Matte Polyurethane

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INLAYS & AESTHETICS

Inlay Design : Rounded Blocks

Inlay Material : Matching Wood

Knobs : Metal

Backplate : Black Brushed Aluminium

Headstock : Matching

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HARDWARE

Bridge : Hipshot USA Ultralite

Tuners : ABM Single Bridge

Hardware Color : Black

Side Dots : Luminlay

Strings : D'Addario NYXL 45/130

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ELECTRONICS

Configuration : Modern

Pickups : Aguilar AJ5 HOT

Layout :

  • Volume
  • Volume
  • Bass / Mid /Treble
  • Mid Switch

Preamp : Aguilar OBP3

Jack : Pure Tone Stereo