Materials and Tone Philosophy

At the core of our bridge designs lies a deep respect for how materials shape sound. Every alloy we choose contributes its own voice — influencing sustain, resonance, tonal color, and overall response. Our mission is to engineer bridges that enhance the natural character of each instrument, translating string vibration into musical energy with precision and soul.

Aluminum 7075-T6

We have placed special focus on 7075-T6 aluminum — a high-strength aerospace-grade alloy renowned for its exceptional balance between rigidity, low weight, and acoustic responsiveness.
Its hardness (≈150 HB) and tensile strength (up to 570 MPa) provide outstanding stability under string tension, while its low density (2.8 g/cm³) allows the instrument’s body to resonate freely, producing an open, dynamic tone.
Thanks to its high sound velocity of approximately 5,100 m/s, vibrations travel through the material with remarkable speed and clarity, enhancing attack, sustain, and note definition.
Another key advantage is anodizing, which not only protects the metal but also enables a wide range of finishes and colors without altering its tonal properties.
  • Key Qualities: Lightweight • Rigid • Fast Sound Transmission • Anodizable
  • Hardness: ~150 HB
  • Tensile Strength: up to 570 MPa
  • Density: 2.8 g/cm³
  • Sound Velocity: ~5,100 m/s

 

Sonic Character:
Fast attack, transparent mids, and open resonance. The reduced mass allows the instrument body to vibrate more freely, producing a lively and dynamic tone.
The surface can be anodized in a wide palette of colors — combining visual expression with unmatched durability, without affecting the tonal spectrum.

Phosphor Bronze (RG12)

Phosphor bronze delivers a rich, harmonically complex tone with a warm midrange and smooth top end. Its higher density (≈8.8 g/cm³) and moderate sound velocity (≈3,500 m/s) produce a slightly slower, more “musical” vibration response — translating into warmth, depth, and sustained resonance.
The material’s hardness (≈110 HB) balances mechanical stability with a natural damping quality that emphasizes organic sustain and harmonic bloom, ideal for players seeking a round, expressive character.
  • Key Qualities: Warm • Musical • Full Midrange
  • Hardness: ~110 HB
  • Density:8.8 g/cm³
  • Sound Velocity: ~3,500 m/s
Sonic Character:
A slower, more “musical” response that emphasizes body and warmth, with a deep, rounded tone and a beautifully sustained decay.

CK45 Steel

CK45 is a medium-carbon steel that offers strong mechanical integrity and powerful tonal focus. With a sound velocity around 5,900 m/s and density of 7.85 g/cm³, it transmits vibrations with authority, giving tight low-end response and articulate sustain.
Its hardness (≈200 HB) ensures energy retention at the bridge, resulting in immediate attack and a rich harmonic spectrum. CK45 bridges are often preferred for players who want definition, projection, and “anchor-like” tonal grounding.
  • Key Qualities: Focused • Tight • Defined
  • Hardness: ~200 HB
  • Density:  7.85 g/cm³
  • Sound Velocity: ~5,900 m/s
Sonic Character:
Powerful projection with strong low-end control. The increased stiffness ensures quick energy transfer and clarity even under heavy string tension.

Titanium

Titanium’s legendary strength-to-weight ratio (density ≈4.5 g/cm³, tensile strength >900 MPa) makes it one of the most acoustically efficient metals available.
With an extremely high sound velocity of approximately 5,100–5,200 m/s, titanium bridges offer instant string response, exceptional sustain, and crystalline clarity.
Its stiffness minimizes micro-energy losses, allowing every nuance of touch and dynamics to pass directly into the instrument body — the ultimate material for precision and articulation.
  • Key Qualities: Ultra-Rigid • Lightweight • Transparent
  • Density: 4.5 g/cm³
  • Tensile Strength: >900 MPa
  • Sound Velocity: ~5,100–5,200 m/s
Sonic Character:
Immediate note response, long sustain, and exceptional clarity. Perfect for players demanding precision and detail in every note.

Stainless Steel (Inox)

Stainless steel combines durability, brightness, and clarity. Its high hardness (≈200 HB) and sound velocity (~5,700 m/s) enhance attack and note definition, yielding a crisp, percussive tone with long-lasting sustain.
With density around 7.9 g/cm³, it produces a slightly heavier response that emphasizes projection and brilliance, while maintaining outstanding corrosion resistance for decades of performance.
  • Key Qualities: Bright • Articulate • Durable
  • Hardness: ~200 HB
  • Density: 7.9 g/cm³
  • Sound Velocity: ~5,700 m/s
Sonic Character:
Crisp attack with a bright, percussive edge and extended sustain — a modern, cutting sound ideal for clarity and definition.

Why Aluminum as Our Core Material

While each alloy brings its own acoustic personality, our primary focus on 7075-T6 aluminum stems from its rare synergy of low mass, structural hardness, and tonal transparency.
It enables bridges that are light yet sonically powerful — enhancing sustain and resonance without muting the natural tone of the instrument. Combined with anodized finishes that add both protection and aesthetic individuality, aluminum 7075-T6 embodies our design philosophy: precision engineering in the service of musical expression.
  • Lightweight: Reduces total instrument mass, allowing the body to breathe and resonate freely.
  • High Hardness: Maintains mechanical stability and efficient energy transfer.
  •  Fast Sound Transmission: Preserves attack and clarity.
  • Anodizing Capability: Enables custom finishes with zero tonal compromise.
Aluminum 7075-T6 bridges deliver the perfect synergy of engineering precision and musical expressiveness — light yet powerful, refined yet resonant.