Audia Flight Three S Integrated Amplifier

The Audia Flight Three S is a 100-watt dual-mono integrated amplifier built around current feedback circuitry, a topology that delivers the bandwidth and transient speed of solid-state with the tonal richness and ease typically associated with tube amplification. Powered by two 576VA toroidal transformers in a fully dual-mono layout, with 85,200µF of total capacitance across twelve dedicated power supplies, the Three S provides a level of authority and composure that belies its mid-range price point. Designed and handcrafted in Civitavecchia, Italy, every unit reflects Audia Flight's commitment to precision engineering and meticulous build quality.

Key Features of the Audia Flight Three S

• Current Feedback Amplification: Wider bandwidth, faster transient response, and lower distortion compared to traditional voltage feedback topologies
• True Dual Mono Architecture: Fully independent left and right channel paths from power supply through output stages for maximum channel separation
• Dual 576VA Toroidal Transformers: Custom-wound, dual-mono low-noise power supply feeding 85,200µF of total capacitance across twelve dedicated supplies
• 100W into 8 Ohms / 160W into 4 Ohms: Stable current delivery into demanding loads with a slew rate exceeding 80V/µs
• Modular Expansion: Optional MM/MC phono board and USB DAC board (24-bit/192kHz) can be factory-installed or retrofitted
• Dedicated Headphone Amplifier: A discrete, high-performance headphone amplifier capable of driving a wide range of headphones
• Home Theater Bypass: Any input can be configured for direct/bypass mode, for smooth integration into a surround system
• OLED Display with Input Naming: Large blue OLED shows selected input, volume, and mode, with user-configurable input labels
• ALPS Blue Potentiometer: Precision volume control with smooth, consistent tracking at all levels
• Italian Design and Construction: 10mm machined aluminum front panel, sealed gold-terminated relays, positive-action metal controls, and solid aluminum remote

Current Feedback Amplification

Most amplifiers use voltage feedback, which feeds back a fraction of the output voltage to correct the signal. Current feedback takes a fundamentally different approach, sensing current at the output and using it to maintain signal accuracy. The practical result is significantly wider bandwidth (the Three S measures 1Hz to 450kHz at -3dB), faster slew rates, and inherently better load stability. For the listener, this translates to a presentation that combines the grip and speed of solid-state with a tonal warmth and texture that voltage feedback designs typically lack. Current feedback is one of the reasons the Three S sounds as composed with a complex orchestral passage as it does with a solo vocal. It also contributes to the amplifier's excellent load stability, maintaining its sonic character regardless of the speaker's impedance curve.

Dual Mono Power Supply Architecture

Inside the Three S, the left and right channels operate as completely independent amplifiers sharing only the chassis and front panel controls. Each channel is powered by its own 576VA toroidal transformer in a fully dual-mono layout, with twelve dedicated power supplies in total. Four high-current supplies provide 72,000µF of capacitance to the output stages, while eight additional stabilized supplies (13,200µF) serve the amplification stages up to the driver transistors. A separate, isolated transformer handles the logic and display circuitry, ensuring that digital noise from the microprocessor never reaches the audio signal path.

Connectivity and Inputs

The Three S provides a comprehensive set of connections for both analog and digital sources. Four unbalanced (RCA) inputs and one fully balanced (XLR) input handle most source components, while a dedicated monitor input accommodates tape decks or recording devices. A separate record output allows signal pass-through to a recorder without affecting the listening output. The preamp output allows the internal amplifiers to be disabled and driven from an external power amplifier, and any single input can be configured as a home theater bypass, passing signal directly to the power amplifier stage without volume attenuation. A headphone output on the front panel provides a high-quality listening option for late-night sessions.

Optional Phono and DAC Boards

Two optional expansion boards allow the Three S to serve as a complete system hub without external components. The Flight Phono Board replaces analog Input 1 with a fully featured MM/MC phono stage, turning the Three S into a one-box solution for vinyl playback. The Flight DAC Board adds a USB digital input (24-bit/192kHz) as Input 6, with ADuM galvanic isolation from Analog Devices to prevent computer-generated noise from reaching the audio circuitry. Both boards can be factory-installed at time of purchase or retrofitted later by an authorized dealer.

Build Quality and Construction

The Three S chassis starts with a 10mm machined aluminum front panel that gives the amplifier a substantial, purposeful presence. Positive-action metal pushbuttons provide tactile feedback for input selection and mode changes, while the large ALPS Blue potentiometer delivers precise volume control with consistent tracking from whisper-quiet to full output. Input switching uses sealed, gold-terminated relays to minimize contact resistance and maintain signal purity over years of use. The large blue OLED display shows the selected input, volume level, and operating mode, and each input can be renamed to match the connected source. The included remote control is machined from solid aluminum, matching the quality of the main unit. Available in silver and black finishes, the Three S fits comfortably alongside components from any era or aesthetic.

Explore the Audia Flight FL Series

The Three S pairs naturally with other components from Audia Flight's FL range. The CD Three S is its matching CD player, sharing the same design language and build quality. The FL Phono is a standalone phono preamplifier for vinyl setups that need more flexibility than the optional internal board. The Flight Phono Board and Flight DAC Board install directly inside the Three S, adding MM/MC phono or USB DAC capability without external boxes. For listeners ready to move up, the FLS 10 is Audia Flight's fully balanced integrated amplifier and the next step in their lineup.

The Listening Room Difference

We're a third-generation family business with a brick-and-mortar showroom in Chestertown, Maryland, and a reputation built on trust, not hype. Whether you're visiting in person or ordering online, we bring decades of experience, personalized service, and honest guidance to every interaction. We don't just ship boxes. We help build systems, answer your questions like real humans, and make sure every detail of your setup is right, from the cables to the final connection. Our passion is helping you get the most out of your gear, with support that lasts well beyond the sale.

Audia Flight Three S Specifications