Lewis CaliburnNew from ARCAM are the A5+, A15+ and A25+, a trio of integrated amplifiers that build on the DNA of the outgoing A5, A15 and A25 with upgraded circuitry, refined components and intelligent power management, achieving enhanced performance.
Each amplifier incorporates ARCAM’s latest Bluetooth 5.4 platform, featuring Snapdragon Sound (AptX Lossless) for bit-perfect CD-quality streaming, LE Audio and Auracast, which allows one-to-many wireless playback without the need for pairing.
Both the A15+ and A25+ now include HDMI eARC – a connectivity upgrade over their predecessors. The Class G-powered A25+ also gains a precision-cut glass front panel that sharpens and brightens the display, complementing the ST25 streaming partner. It receives the most substantial update of the new threesome, with a new transformer featuring a dedicated winding for the digital and DAC circuitry, double linear regulation in the analogue 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, further improving audio fidelity.
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 analogue 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.
“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,” says Scott Campbell, Director of Sales and Marketing at ARCAM. “These are amplifiers built for the way people enjoy music today, and for many years to come.”
A5+ :£749 RRP
The A5+ boasts 2x50W Class AB power and a wide range of digital and analogue inputs, including a tuned MM phono stage. It comes with Auracast and upgraded Bluetooth 5.4, including support for Snapdragon Sound and reduced-noise power supply.
A15+: £1,199 RRP
This model provides 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+.
A25+: £1,699 RRP
The flagship Radia+ integrated delivers 2 x 100W of Class G power, an additional DAC for SPDIF inputs, a USB-C input, HDMI eARC and an OLED display behind a glass panel that matches the ST25.
The ARCAM A5+, A15+, and A25+ will be available from September 2025.