STRUMENTO n° 4 Signature

The first question we asked ourselves when we decided to improve the Strumento series was: where can we make changes to a sound that already seemed practically perfect? As with any creation where every parameter is pushed to the limits of its potential, the only area left to work on is the details. Only by refining every single aspect can we achieve truly superior overall performance. We are convinced of it: the new Strumento Signature models are undoubtedly the finest devices Audia has ever produced.

Strumento N°4 Signature stereo power amplifier is a two-channel unit designed for uncompromising sonic performance and refined aesthetics. With a bandwidth exceeding 1MHz and up to 1000 Watts of output power, it delivers remarkable precision and effortlessly controls even the most demanding speakers.  

Impeccable Design and Construction
A golden plaque on the front highlights its exclusivity. The amplifier’s chassis, crafted from the highest-grade aluminum casting, undergoes meticulous CNC machining, hand-polishing, shot peening, and anodization. These techniques result in a stunning metallic finish that embodies both elegance and durability. The final touch of refinement is achieved through precision silk-screening, completing its sophisticated presentation.  

Unmatched Craftsmanship and Premium Components
Inside this stunning exterior lies a meticulously engineered system featuring fully balanced circuitry and an extensive selection of high-end components. Mundorf capacitors, Dale resistors, and high-frequency Reed relays ensure superior signal purity and low distortion.  A massive 320,000uF capacitor bank provides ultra-stable energy delivery, ensuring exceptional dynamics and signal fidelity. Custom-printed circuit boards with extra gold plating, along with gold-plated internal audio components, enhance contact reliability and long-term performance.  

Revolutionary Power Supply Architecture
The Strumento N°4 Signature sets new benchmarks in amplifier power supply design. Each channel is powered by dual high-current supplies, complemented by four independent stabilized stages—two for the input section and two for the Audia Flight current-feedback stage. Ultra-fast rectifiers and low-impedance capacitors provide flawless power filtration, minimizing noise and interference. Two robust 150VA toroidal transformers power the main stages, while a dedicated 15VA toroidal transformer manages logic and protection circuits. Unlike traditional designs, it eliminates fuses in the output stage, using microprocessor-monitored current sensors for superior sonic purity.  

Exclusive Gain Stage and Mechanical Innovation
At its core, a proprietary Class A current-feedback gain stage is housed in an aluminum enclosure, encapsulated in epoxy resin for thermal stability and shielding against electromagnetic interference. This design ensures optimal performance, preserving detail and accuracy in sound reproduction. The output stage benefits from a custom-built 3000VA transformer, sealed in epoxy resin with dual ferromagnetic shields for immense power and isolation.  

Precision Vibration Isolation for Sonic Purity
Mechanical integrity is a priority in the Strumento N°4 Signature. The power transformers are mounted on an independent chassis, physically decoupled from the main audio circuit. This carefully engineered isolation system directs unwanted vibrations away from sensitive components, maintaining pristine sound quality even under high-power conditions.  

A Statement in Sonic and Visual Excellence
The Strumento N°4 Signature stereo power amplifier is an extraordinary achievement in high-end audio engineering. With its fusion of cutting-edge technology, precision craftsmanship, and aesthetic brilliance, it delivers a musical experience of unparalleled depth and realism. Only the Strumento N°8 Signature Mono-block Power Amplifiers surpass its brilliance, making the Strumento N°4 Signature the ideal centerpiece for discerning audiophiles who demand nothing less than perfection.