Marē 4 - Signature luxury bass guitar by Belforti, high-end custom boutique design, premium craftsmanship for musicians.
About this bass

The Marē 4 Signature is a four-string bass built for players who refuse to compromise — on tone, on feel, or on beauty. A showcase of premium tonewoods and boutique electronics, every material choice reinforces the next.
A redwood body frames a stunning birdseye maple top, its natural figuring extending seamlessly through the matching neck and fretboard. Stainless steel frets and custom burgundy routed inlays complete a playing surface that is as precise as it is distinctive. Delano Xtender pickups and a Glockenklang preamp deliver a tonal palette that moves from deep, pillowy lows to glassy highs with effortless control — finished in gold hardware throughout.
The Marē 4 Signature is not a production instrument. It is a commission — a bass built to last a lifetime.

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

Back view of Marē 4 - Signature bass guitar by Belforti, showcasing custom high-end boutique design.

Features

Marē 4 - Signature high-end custom boutique luxury bass guitar by Belforti Instruments showcasing advanced craftsmanship and tonal depth.

Shape

Marē 4 - Signature luxury bass guitar by Belforti, featuring custom boutique design with high-end craftsmanship and premium materials.

Core Specs

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

Woods

Marē 4 - Signature custom bass guitar by Belforti Instruments, showcasing boutique craftsmanship with luxury wood finish.

Options

Marē 4 - Signature bass guitar by Belforti, custom boutique luxury instrument with high-end craftsmanship and tonal depth.

Birdseye Maple

Few tonewoods command attention the way birdseye maple does. Characterized by its dense concentration of small, swirling eye-shaped figures scattered across the surface, it is one of the rarest naturally occurring wood phenomena — the result of unusual grain distortion during growth, and impossible to cultivate or predict. No two tops are alike, and highly figured pieces are considered collector-grade material in their own right.
Acoustically, birdseye maple contributes brightness, sustain, and a tight low-end response that pairs well with warmer body woods beneath it. As a top, it adds definition and articulation to the overall voice of the instrument without overpowering the tonal character of the core. Under a clear finish, the figuring takes on a three-dimensional, almost liquid quality — shifting and shimmering as the light angle changes, making it as alive to the eye as the instrument is to the ear.

Lovely Curves

Signature Series tops are not only bent on the armrest which keeps intact the beautiful grain, but they are also inlayed, which seamlessly integrates the top to the body.

Electronics

In the Signature Series, every circuit and component is chosen to serve one purpose — to capture the purest form of the instrument’s voice.

Each system delivers a wide dynamic range, low noise floor, and exceptional touch response, allowing the sound to remain open, articulate, and deeply expressive.
Whether it’s the focused energy of a guitar under gain or the enveloping presence of a bass in motion, the Signature electronics translate nuance into authority.

Transparent, powerful, and responsive, they embody the S-Series philosophy: maximum output without distortion, and emotion without compromise.

Pickups
  • 2 Delano Xtenders

Delano's Xtender series represents a reference point in boutique bass pickup design. The quad-coil architecture delivers full, even response across the string range with virtually no hum, while retaining the organic character and punch that passive-voiced pickups are known for. Wide dynamic range, exceptional clarity, and a natural sensitivity to playing nuance make the Xtenders a trusted choice among professional players and custom instrument builders alike.

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Circuit

Preamp

Glockenklang 3 Band

Designed and manufactured in Germany, the Glockenklang 3-band preamp is widely regarded as one of the benchmark active electronics solutions in high-end bass building. Its wide yet musical EQ range enhances rather than colors the natural voice of the instrument, with bass, mid, and treble controls that respond with exceptional transparency. Clean, quiet, and precise — it preserves the fundamental character of the pickups and tonewoods it works with, rather than imposing a sound of its own.

Layout

  • Volume
  • Blend
  • Mid
  • Bass / Treble (Stack)

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 : 4

Scale Length : Standard - 34"

String Spacing : 18.5

Weight : 3.8kg

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TOP, BODY, NECK & FRETBOARD
  • TOP

Top : Birdseye Maple

Contrast Layer : 3 Ply BWB Purfling

  • BODY

Body Wood : American Redwood

Body Wood Rating : 97,43R

Chambering : Non Chambered

  • NECK

Neck Wood : Birdseye Maple

Neck Wood Rating : 95,58R

Neck Profile : S

Nut Width : 39mm

  • FRETBOARD

Fretboard Wood : Birdseye Maple

Fretboard Wood Rating : Birdseye Maple

Fretboard Radius : Modern 12" to 16"

Number of Frets : 24 - Stainless Steel Jumbo

Fret Wire : Jumbo Stainless Steel

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FINISH

Body Finish : Ultra Thin High Gloss Polyurethane

Neck Finish : Ultra Thin Satin Polyurethane

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INLAYS & AESTHETICS

Inlay Design : Signature Rounded Blocks

Inlay Material : Matching Wood

Knobs : Metal

Backplate : Black Brushed Aluminium

Headstock : Matching

Illustration of two screws with blue spiral threads on a white background
HARDWARE

Bridge : ABM Single Bridge

Tuners : Hipshot USA Ultralite

Hardware Color : Gold

Side Dots : Black Dots

Strings : D'Addario NYXL 45/100

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ELECTRONICS

Configuration : Ultra

Pickups : 2 Delano Xtenders

Layout :

  • Volume
  • Blend
  • Mid
  • Bass / Treble (Stack)

Preamp : Glockenklang 3 Band

Jack : Pure Tone Stereo