The S-Series represents the pinnacle of Belforti Instruments — crafted for musicians who demand the highest level of precision, expression, and craftsmanship. These instruments combine advanced construction techniques with premium materials to deliver uncompromising performance and exceptional tonal depth. Every detail, from the sculpted body contours to the finely tuned electronics, is designed to offer ultimate playability and versatility. The S-Series stands for prestige and individuality, giving players a bold, responsive instrument that rises to any musical challenge. With its blend of sophistication and power, the S-Series is built for those who seek the very best.
S1 LC Signature
The Leo Chazallet Signature S1 Bass is the result of a close collaboration between Leo and Belforti Instruments, developed entirely under our Omakase philosophy. Every element of this instrument has been designed to reflect Leo’s technical needs and artistic vision. By immersing ourselves in his musical universe, we crafted an instrument that aligns perfectly with his style, sound, and identity. The result is a bass that feels like a true extension of the player — offering power, precision, and unmistakable character. With its unique voice and responsive playability, this signature model is built for demanding musicians who seek both individuality and performance at the highest level.
Inlay Material : Black & Gold Web Recon Stone with Brass Outline
Neck Inlay : Brass Signature Rounded Block with Black Core
Main Color : Outer Space Black
Core Features
These are the core features common to all Belforti Guitars and Basses :
Made in France
PLEK Treatment
Rated Tonewoods
Invisible Fret Tangs
Radiused Fret Slots
Angled Full Length Carbon Reinforcements
Easy Truss Rod Access
Selected Bone Nuts
Handwound Pickups
Matching Pickup Shells
Optima 24KGold Strings
Belforti x ABM Single Saddle Bridge
Thin Frets
UltraThin Polyurethane
Warranty
Every Belforti instrument comes with a comprehensive warranty covering manufacturing defects and workmanship for a lifetime. This warranty ensures quality and craftsmanship. Exclusions apply. For any issues, contact our support team for prompt resolution. Enjoy peace of mind knowing your instrument is backed by our commitment to excellence.
Delivery
Production time
Between 6 and 8 months
*If the instrument is in stock, shipping occurs within days.
Delivery
Orders are shipped from France, ensuring no extra fees within the European Union. For customers outside the EU—such as those in Norway, Switzerland, or Iceland—local import fees and duties will be applied based on your country's regulations.
Guitars and large items benefit from fast, free* delivery via DHL Express with On Demand Delivery, allowing you to track and manage your shipment throughout its journey.
If you have any questions, feel free to contact us. We will respond as quickly as possible, within 24 hours on weekdays.
Delivery information
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Consumer services
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Contact us
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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
Features
Features
Overview
The S-Series is the flagship of Belforti's line up. With these instruments, we aim at delivering exceptional performances, precision and power, in a form factor that is the embodiement of luxury, and world class crafstmanship.
As a part of this Series, this instrument features the following :
Private Stock Woods
Our Private Stock Woods represent the absolute pinnacle of tonal and aesthetic excellence, handpicked for their unparalleled beauty and unique sonic characteristics.
All of the woods in the Private Stock score between 91 and 100 on the Belforti Rating. These pieces are extremely rare and are the results of intense researchs and sourcing.
Wrapped Inlayed Top
S-Series tops are inlayed in the body, and outlined with a 3 ply purfling.
This creates a seamless integration of the top in the instrument's design, gives it a natural contoured binding look, and did we mention it still follows the curve of the armrest ?
Signature Pickup Shells
S-Series instruments feature Signature Matching Pickup Shells, meticulously crafted to harmonize with the overall design of your instrument. They are a mirror of our inlayed top, as the matching wood isinlayed in the shellto mimic the top of the S-Series
Signature Inlays & Side Dots
S-Series Inlays are subtle, elegant rework of our standard inlays. They are an outlined version, to preserve the private stock woods' grain. They are matching your top, and extracted as one piece of wood each.
EVO Gold Frets
Made from a special copper alloy, EVO Gold Frets offer a perfect blend of strength and longevity without sacrificing tonal clarity. They are remarkably resistant to wear, ensuring that your instrument stays in peak condition for years, even under heavy use.
Not only do they provide a silky-smooth playing experience, but their distinct gold color adds an extra layer of aesthetic sophistication to your instrument.
Shape
Shape
Model 1
Our Model 1 Bass pays homage to the timeless Jazz Bass design, while redefining its core attributes. With a smaller, more ergonomic footprint and an emphasis on improved balance, this instrument offers the perfect blend of classic aesthetics and modern functionality.
Whether you're a seasoned pro or a budding musician, the Model 1 promises an exceptional playing experience that's rooted in tradition but designed for the demands of today's players.
Core Specs
Core Specs
Number of strings : 4
The traditional bass configuration. Lightweight, balanced, and essential for most musical styles. Offers simplicity, clarity, and a classic feel with optimal string spacing and comfort.
Scale Length : Standard - 34”
The industry-standard bass scale length. Offers a balanced feel between string tension, playability, and clarity. Ideal for versatile playing styles and compatible with most bass string sets.
Number of frets : 24 - Medium/Medium - EVO Gold
Extended-range configuration offering two full octaves per string. Ideal for soloing, technical playing, and modern styles requiring upper-register access.
Neck Profile : M
Versatile and balanced neck profile suited to most playing styles. Offers ergonomic comfort and support without feeling too thin or chunky.
Fretboard Radius : 12 to 16"
Flatter fretboard radius for fast playing, low action, and effortless bending. Ideal for technical and contemporary playing styles.
Woods
Woods
Body : European Ash
Ash is a dense, heavy hardwood with a pronounced open grain structure. Its rigidity provides excellent sustain and energy transfer. Often visually striking, it is harder to machine due to its density. Ash bodies tend to have a bright resonance and deliver long-lasting vibrations throughout the instrument.
Neck : Flamed Norwegian Maple
Flamed Maple is structurally identical to standard maple but features striking, undulating flame-like figure caused by irregular grain patterns. It maintains the same medium weight, excellent stiffness, and stability. Often selected for its visual appeal, Flamed Maple offers a premium aesthetic without compromising the reliability and strength of a maple neck.
Fretboard : Gaboon Ebony
Gaboon Ebony is one of the densest and hardest woods used for fretboards. Its extremely fine grain offers an ultra-smooth, fast-playing surface with almost no pores. Naturally jet black or with subtle streaking, it is highly resistant to wear and climate changes, making it a high-performance choice.
Options
Options
This is a list of the non standard options featured on this instrument
High Gloss Body Finish
High Gloss Neck Finish
Brass Faux Pickguard & Frontplate
Brass Pickup Shells Inlay
Gold Hardware
Recon Stone Inlays
Brass & Black Neck Inlay
Matching Headstock
Brass Logo & Initials
Buffalo Horn Nut
About Léo
A true virtuoso of the bass, Leo Chazallet has built a reputation as one of the most versatile and expressive bassists of his generation. With a deep foundation in flamenco, jazz, and world music, his playing is defined by precision, groove, and an innate musicality that transcends genres.
Leo’s career has taken him across the globe, performing on some of the most prestigious stages and collaborating with renowned artists. His technical prowess and rich musical sensibility have made him an in-demand session musician and live performer. Now, as the touring bassist for The Gipsy Kings, he continues to bring his signature energy and passion to audiences worldwide.
Whether delivering intricate melodies, locking in tight rhythmic foundations, or exploring new sonic landscapes, Leo Chazallet is a musician who constantly pushes the boundaries of his instrument. His dedication to his craft and his ability to elevate any musical setting make him a true standout in the world of bass.
The Leo Chazallet Signature S1 Bass is the result of a deep, uncompromising collaboration between Leo and Belforti Instruments—a bass designed not just to meet his needs but to embody his artistry.
Following our Omakase philosophy, this instrument was crafted without an initial blueprint for aesthetics. Instead, we built it from the ground up, starting with a technical foundation tailored to Leo’s playing style. From there, we immersed ourselves in his world—his influences, his stage presence, his sound—to shape an instrument that truly represents him. The result is a bass that feels as if it has always belonged in his hands.
Every curve, every material choice, and every sonic detail was guided by what we discovered about Leo—his energy, his finesse, and his unmistakable voice on the instrument. The Signature S1 is more than a custom bass; it is the physical manifestation of a deep musical connection between luthier and artist.
Available in 3 Colors
Outer Space Black
Alpine Snow White
Aged Bordeaux Red
Supercharged. by Belforti
Ultra Electronics
The Léo Chazallet Signature comes equiped with our Ultra Electronics. With a twist
Like the name suggests, the Ultra Electronics are a supercharged, boosted version of our electronics. It is paired with our AURA IV Pickups Family, which retain the architecture of the AURA III family, but replacing the magnets with Alnico 8s.
These are the most powerfull, precise, and pulling magnets available. They are not only powerfull, they preserve the natural sound of the instrument and are not to modern or aggressive like ceramic or neodymium.
Just tell your sound engineer before playing, you've been warned.
Pickups
2 AURA IV-J
The AURA IV-J features a stacked dual-coil design tailored for bass players who desire the precision of a single-coil format with the power of Alnico 8 pole pieces. This high-output pickup delivers an exceptionally clear and bright tonal palette, with scattered windings enhancing its definition and articulation. The stacked architecture minimizes noise, ensuring a hum-free performance while maintaining the dynamic highs and punchy mids. Ideal for genres requiring sharp clarity and detail, the AURA IV-J adapts effortlessly, offering a cutting-edge sound with vintage warmth. Elevate your bass rig with the unmatched clarity and modern precision of the AURA IV-J.
The John East Uni-Pre 5 is a high-performance, fully parametric 5-knob active preamp designed to offer unparalleled tonal flexibility while preserving the natural character of the instrument. Known for its studio-quality sound, ultra-low noise floor, and intuitive controls, this preamp is a favorite among professional bassists who demand precision and versatility.
Layout
Volume
Blend
Mid - Mid Sweep (Stacked)
Bass - Treble (Stacked)
Passive Tone - Active Passive (Stacked)
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
GENERAL SPECS
Body Shape : Model 1 Classic
Number of Strings : 4
Scale Length : Standard 34"
String Spacing : 18mm
Weight : 4kg
TOP, BODY, NECK & FRETBOARD
BODY
Body Wood : European Ash (Fraxinus excelsior - France)
Body Wood Rating : 92,38R
Chambering : Non Chambered
NECK
Neck Wood : Norwegian Flamed Maple (Acer platanoides - Norway)
