Both the A15+ and A25+ now include HDMI eARC – a connectivity upgrade that is required in today’s market. The Class G-powered A25+ also gains a precision-cut glass front panel that sharpens and brightens the display, complementing the combinations with the Radia ST25 streaming player. This model receives the most substantial update of the range, with a new transformer featuring a dedicated winding for the digital and DAC circuitry, double linear regulation in the analog power supplies, and further power and mains filtering refinements to lower impedance and enhance overall clarity.
The transformer upgrades in both the A15+ and A25+ further reduce unwanted current within the chassis; meanwhile, the A5+ benefits from component refinements that cut PCB interference and lower power supply impedance. The A25+ design also incorporates an ESS9018 DAC dedicated to SPDIF inputs, delivering superior audio fidelity.
As Jim Garrett, Senior Director, Product Strategy and Planning at ARCAM and Harman Luxury Audio explained to audioXpress, “With the A5+, A15+, and A25+, we’ve taken everything people love about the Radia amplifiers and pushed performance to the next level. From the upgraded circuitry and next-generation Bluetooth to the expanded connectivity, every change enhances the user experience.”
“Noise reduction remains a key engineering focus. By selectively powering down idle components, the overall noise floor is significantly decreased. For example, the DAC PCB is powered down when an analog input is used; the Bluetooth and HDMI modules are powered off with the Autoswitch features disabled; and the trigger input is powered down when no cable is connected – all measures that contribute to a cleaner power supply environment,” Jim Garrett adds. “These are amplifiers built for the way people enjoy music today, and for many years to come.”
The ARCAM Radia A5+ model serves as a perfect introduction to premium hi-fi systems, with 2x50W Class AB power and a wide range of digital and analog inputs, including a tuned MM phono stage. Now with Auracast and upgraded Bluetooth 5.4, including support for Snapdragon Sound, and a reduced-noise power supply, this Radia+ integrated amplifier is an excellent option with an MSRP of $1,199.95. The next A15+ model adds more muscle for larger rooms and tower speakers, providing 2x80W Class AB amplification, HDMI eARC for seamless TV integration, and all the wireless upgrades of the A5+ at an MSRP of US $1,499.95.
Finally, the A25+ is the flagship of the Radia+ integrated amplifier series, delivering 2x100W of Class G power, an additional DAC for SPDIF inputs, USB-C input, HDMI eARC, and an OLED display behind a glass panel that matches the ST25 streamer. With an MSRP of US $1,999.95, it is still a sensible choice for users looking for a versatile hifi option.
Expanding on the company’s roots in Cambridge — stretching back almost 50 years — ARCAM continues to push engineering boundaries, and the A5+, A15+, and A25+ amplifiers are an excellent example of how the brand expands options for the Harman Luxury Audio division. The ARCAM A5+, A15+, and A25+ made their American debut at CEDIA Expo 2025 and will start shipping in early Q4 2025.
ARCAM has now been developing and making CD players for almost 30 years, and for 40 years, the descendants of the amplifier with which the company started in consumer electronics, and as far back as 1995, expanded into home cinema electronics, developing a world-class reputation for making some of the best-sounding AV electronics. ARCAM has also developed its DVD players and, more recently, Blu-ray players from scratch in the UK, engineering them using its decades of experience in CD players to ensure they play music as well as they do movies.
ARCAM is part of the Harman Luxury Audio Group portfolio (JBL, JBL Synthesis, Lexicon, Mark Levinson, and Revel), a lifestyle division business unit of Harman International, headquartered in Northridge, California.
www.arcam.co.uk
www.harmanluxuryaudio.com
