New ARCAM Radia+ Amplifiers

  • Posted on 10 September 2025

New ARCAM Radia+ Amplifiers: Enhanced Performance and Modern Connectivity

The latest evolution of ARCAM's acclaimed Radia series brings refined engineering and advanced features to integrated amplifier design

ARCAM has introduced three new integrated amplifiers that build upon the success of their award-winning Radia series. The A5+, A15+ and A25+ models incorporate upgraded circuitry, enhanced connectivity options and improved engineering throughout, delivering superior performance across the range.

At Martins Hi-Fi, we've been impressed by the thoughtful refinements ARCAM has made to these amplifiers. Each model addresses the practical needs of today's music listeners whilst maintaining the company's reputation for exceptional sound quality.

Key Improvements Across the Range

The most significant upgrade comes in the form of Bluetooth 5.4 technology with Snapdragon Sound support. This provides AptX Lossless streaming, ensuring wireless music playback maintains CD-quality fidelity. The inclusion of Auracast technology allows multiple devices to connect without traditional pairing procedures.

ARCAM's engineers have also focused on noise reduction throughout the design. Components are selectively powered down when not in use – the DAC circuit powers off during analogue playback, whilst unused modules shut down automatically. This intelligent power management significantly reduces the noise floor, allowing more musical detail to emerge.

The Three Models Explained

ARCAM A5+ - £749

The entry point to the Radia+ series offers 2x50W of Class AB amplification with a comprehensive selection of inputs. The built-in MM phono stage has been refined for improved vinyl reproduction, whilst the power supply design incorporates noise-reducing modifications.

This amplifier suits smaller to medium-sized rooms and works particularly well with bookshelf speakers. The range of connectivity options ensures compatibility with both traditional and modern source components.

ARCAM A15+ - £1,199

Providing 2x80W of Class AB power, the A15+ includes HDMI eARC connectivity for television integration. The enhanced transformer design reduces unwanted current within the chassis, contributing to cleaner sound reproduction.

This model addresses the needs of larger listening rooms and more demanding loudspeakers. The HDMI eARC connection simplifies system integration for those combining music and television audio.

ARCAM A25+ - £1,699

The flagship model delivers 2x100W through efficient Class G amplification. Notable upgrades include a dedicated ESS9018 DAC for SPDIF inputs, USB-C connectivity, and a new transformer with separate windings for digital circuitry.

The precision-cut glass front panel houses an OLED display designed to complement the ST25 streamer. Double linear regulation in the analogue power supplies and enhanced filtering further improve performance.

Radia at Martins Hi-Fi

Why These Amplifiers Matter

ARCAM's approach to the Radia+ series demonstrates careful evolution rather than wholesale redesign. The company has identified specific areas for improvement and addressed them systematically. The result is amplifiers that sound noticeably cleaner and more detailed than their predecessors.

The enhanced connectivity options reflect modern listening habits without compromising analogue performance. Whether streaming wirelessly from a smartphone or playing vinyl records, each source receives appropriate attention in the circuit design. 

These amplifiers are designed for long-term ownership, with the electronic and mechanical robustness to deliver consistent performance over many years.

Hearing the Difference

The improvements in the Radia+ series are immediately apparent during listening. The reduced noise floor allows subtle musical details to emerge more clearly, whilst the upgraded power supplies provide better control over dynamic passages.

Wireless streaming quality through the new Bluetooth implementation approaches wired connection standards – a significant achievement for convenient everyday listening. The phono stages in particular benefit from the circuit refinements, with improved tracking of complex musical passages.

Experience the Radia+ Series at Martins Hi-Fi

Our Norwich showroom provides an ideal environment to evaluate these amplifiers properly. We can demonstrate each model with appropriate speakers and source components, allowing you to assess which suits your requirements.

The choice between models depends largely on your room size, speaker preferences and connectivity needs. Our team can guide you through the decision-making process, ensuring you select the amplifier that will provide years of musical satisfaction.

Come in and have a proper listen to all three models in our comfortable listening room. There's nothing quite like hearing the differences for yourself to work out which one's right for you.

Availability and Next Steps

The ARCAM Radia+ amplifiers are available now. To arrange a demonstration or discuss which model might suit your requirements, contact our team or visit our Norwich showroom.

The best way to choose an amplifier is to actually listen to it with your own music. These new Radia+ models are genuinely better than what came before, and we reckon most people will hear the difference straight away.

For over 40 years, Martins Hi-Fi has served Norwich and the surrounding area with expert advice and carefully selected audio equipment. Our team's experience helps ensure you make the right choice for your listening requirements.

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