Power amplifiers stereo — Audia Flight STRUMENTO n° 4 Signature

The STRUMENTO n° 4 Signature is a flagship stereo power amplifier from Audia Flight, an Italian manufacturer, sitting within the brand's Signature tier as a refined edition offering meaningfully greater output and control than the standard STRUMENTO n° 4. Audia Flight's engineering philosophy across its STRUMENTO range consistently emphasises exceptional control and authority across the entire audible spectrum.

Key specs that matter

Input sensitivity is 1,410mV, with input impedance held at 7,500 ohms on both balanced and single-ended connections. Output power is 300W into 8 ohms, doubling cleanly to 600W into 4 ohms - a textbook power doubling reflecting a robust, well-regulated power supply. Gain is 29dB. Signal-to-noise ratio reaches 110dB, with total harmonic distortion plus noise under 0.05% with full global feedback engaged, and an extraordinary damping factor exceeding 1,000 - an exceptional figure indicating outstanding control over connected loudspeaker driver movement, considerably higher than even many other reference-tier amplifiers achieve. Maximum power consumption is 1,000W. At 450 x 280 x 500mm and 103.5kg, the STRUMENTO n° 4 Signature represents a substantial stereo amplifier commitment.

Sound and use context

Expect exceptional control and authority reflecting the extraordinary damping factor exceeding 1,000 - this combination of substantial power reserve and exceptional control suggests a design specifically engineered to grip and control a loudspeaker's drivers with minimal editorializing, letting whatever signal arrives at the input translate faithfully into acoustic output.

Pairing

The damping factor exceeding 1,000 and substantial output into both 8 and 4 ohm loads suit demanding, low-impedance loudspeakers directly, and the wide 7,500 ohm input impedance eases compatibility with virtually any preamplifier.

Alternatives

Audia Flight's flagship STRUMENTO n° 8 sits above this Signature model with even greater output and scale, worth the further investment if the n° 4 Signature's already substantial performance still leaves ambitions for Audia Flight's most accomplished current design. Audia Flight's Signature tier consistently represents the brand's most refined execution of a given base model's core engineering, and the n° 4 Signature's exceptional damping factor specifically reflects that additional attention to power-supply and output-stage refinement. Recommended overall for buyers seeking exceptional control and authority.