The Leo Chazallet Signature S1 Bass is the result of a deep collaboration between Leo and Belforti Instruments, crafted entirely under our Omakase philosophy. Designed around his technical needs, we shaped its aesthetics by immersing ourselves in his world—his sound, style, and musical identity. The result is a bass that feels like an extension of Leo himself, delivering power, precision, and a voice as unique as the artist who plays it.
Check out the detailed specs at the bottom of the presentation page
If you have any questions, feel free to contact us. We will respond as quickly as possible, within 24 hours on weekdays.
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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.
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)
