ARCAM, a cornerstone of high-fidelity audio since its founding in Cambridge nearly 50 years ago, continues to redefine the hi-fi landscape with the launch of its Radia+ Series integrated amplifiers the A5+, A15+, and A25+. Building on the success of the acclaimed Radia Series introduced in 2023, these new models elevate performance with upgraded circuitry, next-generation connectivity, and refined design. The trio makes its North American debut at CEDIA Expo 2025, September 3-6, in Denver, Colorado, at Booth #2512.
The Radia+ amplifiers enhance the legacy of their predecessors the A5, A15, and A25 with advanced engineering, intelligent power management, and cutting-edge features tailored for modern music enthusiasts. Each model incorporates Bluetooth 5.4 with Snapdragon Sound (AptX Lossless) for bit-perfect CD-quality streaming, LE Audio, and Auracast, enabling seamless one-to-many wireless playback without pairing. These upgrades ensure the amplifiers are ready for the evolving demands of audio consumption.
Engineering Excellence for Superior Sound
The Radia+ Series introduces significant upgrades to circuitry and components, delivering enhanced clarity and reduced noise. The flagship A25+, powered by Class G amplification, features a precision-cut glass front panel with an OLED display that complements its streaming partner, the ST25. It boasts a new transformer with a dedicated winding for digital and DAC circuitry, double linear regulation in analogue power supplies, and enhanced power and mains filtering for lower impedance and pristine audio fidelity. Additionally, an ESS9018 DAC dedicated to SPDIF inputs elevates sound quality further.
The A15+ shares transformer upgrades with the A25+, minimizing unwanted current within the chassis, while the A5+benefits from component refinements that reduce PCB interference and lower power supply impedance. Noise reduction is a core focus across the lineup, with idle components selectively powered down to create a cleaner power environment. For example, the DAC PCB powers off during analogue input use, and Bluetooth and HDMI modules deactivate when Autoswitch features are disabled.
“With the A5+, A15+, and A25+, we’ve taken everything people love about the Radia amplifiers and pushed performance to the next level,” said Jim Garrett, Senior Director, Product Strategy and Planning at ARCAM and HARMAN Luxury Audio. “From the upgraded circuitry and next-generation Bluetooth to the expanded connectivity, every change enhances the user experience. These are amplifiers built for the way people enjoy music today, and for many years to come.”
Enhanced Connectivity for Modern Lifestyles
The A15+ and A25+ introduce HDMI eARC, enabling seamless integration with TVs for a premium audio experience. The A25+ also features a USB-C input, expanding connectivity options. All three models support a wide range of digital and analogue inputs, including a tuned MM phono stage for vinyl enthusiasts, ensuring versatility for any audio setup.
ARCAM Radia+ Amplifiers: Model Breakdown
A5+ – MSRP $1,199.95
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Perfect for Premium Hi-Fi Beginners
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Power: 2 x 50W Class AB amplification
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Features:
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Wide range of digital and analogue inputs, including tuned MM phono stage
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Bluetooth 5.4 with Snapdragon Sound, LE Audio, and Auracast
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Reduced-noise power supply for enhanced clarity
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Compact design for versatile placement
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A15+ – MSRP $1,499.95
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Ideal for Larger Rooms and Tower Speakers
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Power: 2 x 80W Class AB amplification
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Features:
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HDMI eARC for seamless TV integration
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Bluetooth 5.4 with Snapdragon Sound, LE Audio, and Auracast
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Upgraded transformer for reduced chassis interference
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Robust connectivity for dynamic setups
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A25+ – MSRP $1,999.95
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Flagship Radia+ Amplifier
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Power: 2 x 100W Class G amplification
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Features:
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HDMI eARC and USB-C input for versatile connectivity
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Dedicated ESS9018 DAC for SPDIF inputs
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Precision-cut glass front panel with OLED display
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Advanced transformer and power management for superior audio fidelity
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Matches the ST25 streamer for a cohesive aesthetic
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A Legacy of Audio Innovation
Rooted in nearly five decades of Cambridge engineering, ARCAM continues to push the boundaries of audio precision. The Radia+ Series exemplifies this commitment, blending cutting-edge technology with elegant design to deliver exceptional sound that resonates for years to come.
The ARCAM A5+, A15+, and A25+ will begin shipping in early Q4 2025. Experience them firsthand at CEDIA Expo 2025, Booth #2512, and discover how ARCAM is redefining hi-fi excellence.
