ARCAM is taking integrated amplification to the next level with the launch of its new Radia+ series—A5+, A15+, and A25+—at CEDIA Expo 2025 in Denver, Colorado (Sept. 3-6, Booth #2512). Building on the award-winning Radia lineup first unveiled in 2023, these new integrated amplifiers combine upgraded circuitry, refined components, and intelligent power management for noticeably enhanced performance.
But the real headline is connectivity: each Radia+ model features the latest Bluetooth 5.4 platform with Snapdragon Sound (aptX Lossless), LE Audio, and Auracast, enabling higher quality streaming and one-to-many wireless playback without pairing.
The Radia+ amps exemplify a growing trend in high-end hi-fi—integrating LE Audio, Auracast, and aptX Lossless into both integrated and network amplifiers—consumers can expect to see this at almost every price point going forward.
ARCAM Radia+ Series: Upgraded Circuits, Next-Gen Bluetooth, and Smart Power Management
Both the A15+ and A25+ now come with HDMI eARC, a clear step up from their predecessors. The Class G-powered A25+ gets the full treatment with a precision-cut glass front panel that sharpens the display and pairs visually with the ST25 streaming partner. The A25+ also receives the biggest internal overhaul in the lineup: a new transformer with a dedicated winding for the digital and DAC circuits, double linear regulation in the analogue power supplies, and extra power and mains filtering to lower impedance and improve overall clarity.
The transformer upgrades on the A15+ and A25+ further reduce unwanted current inside the chassis, while the A5+ sees component refinements that cut PCB interference and lower power supply impedance. On top of that, the A25+ adds an ESS9018 DAC dedicated to SPDIF inputs, delivering cleaner, more accurate audio.
Noise reduction remains a major focus. Idle components are powered down automatically: the DAC PCB shuts off when using analogue inputs, the Bluetooth and HDMI modules turn off if Autoswitch is disabled, and the trigger input powers down when no cable is connected. All of this helps create a quieter, more stable power supply.
“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. These are amplifiers built for the way people enjoy music today, and for many years to come.” — Jim Garrett, Senior Director, Product Strategy and Planning at ARCAM and HARMAN Luxury Audio
ARCAM Radia+ Series Overview: A5+, A15+, and A25+ Integrated Amplifiers with Next-Gen Connectivity
A5+: The ideal entry point into premium hi-fi, offering 2 x 50W Class AB power and a versatile range of digital and analogue inputs, including a tuned MM phono stage. Now featuring Auracast, upgraded Bluetooth 5.4 with Snapdragon Sound, and a reduced-noise power supply.
A15+: Built for larger rooms and tower speakers, delivering 2 x 80W Class AB amplification, with HDMI eARC added for seamless TV integration, and all the wireless upgrades of the A5+.
A25+: The flagship Radia+ integrated amplifier offers 2 x 100W Class G power with a USB-C input, HDMI eARC, an OLED display behind a glass panel that matches the ST25, and all the wireless upgrades.
With nearly 50 years of engineering heritage in Cambridge, ARCAM continues to push audio boundaries. The A5+, A15+, and A25+ exemplify the company’s commitment to precision and performance, delivering exceptional sound that will impress for years.
Specifications Compared
| A5+ | A15+ | A25+ | |
| MSRP | $1,199 | $1,499 | $1,999 |
| Type | Integrated Amp with Bluetooth | Integrated Amp with Bluetooth | Integrated Amp with Bluetooth |
| Power @ 8 ohms | 2 x 50 watts | 2 x 80 watts | 2 x 100 watts |
| Power @ 4 ohms | 2 x 75 watts | 2 x 120 watts | 2 x 165 watts |
| Amplification | Class AB | Class AB | Class G |
| Harmonic Distortion | 0.003% | 0.002% | 0.002% |
| Analog Inputs | 3 (RCA Pairs) | 3 (RCA Pairs) | 3 (RCA Pairs) |
| SNR (A-wtd) Analog | 106 dB | 106 dB | 106 dB |
| SNR (A-wtd) Digital | 109 dB | 109 dB | 109 dB |
| HDMI eARC | – | Yes | Yes |
| USB-C Input | – | – | Yes |
| DAC | ESS ES9018 | ESS ES9018 | ESS ES9018 |
| Max Digital Audio | 24-bit/192kHz | 24-bit/192kHz | 32-bit/384kHz |
| Phono Input | MM | MM | MM |
| Bluetooth | 5.4; A2DP Sink/Source, AVRCP, BLE, Snapdragon Sound, AAC, LE Audio, Auracast | 5.4; A2DP Sink/Source, AVRCP, BLE, Snapdragon Sound, AAC, LE Audio, Auracast | 5.4; A2DP Sink/Source, AVRCP, BLE, Snapdragon Sound, AAC, LE Audio, Auracast |
| Dimensions | 431 x 344 x 83mm | 431 x 344 x 98mm | 431 x 344 x 83mm |
| Weight | 8.14 kg | 10 kg | 9 kg |
The Bottom Line
The ARCAM Radia+ series – A5+, A15+, and A25+ – represents a meaningful leap in integrated amplifier design, combining upgraded circuitry, intelligent power management, and next-generation connectivity. With Bluetooth 5.4, Auracast, and Snapdragon Sound (aptX Lossless), these amps bring CD-quality streaming and one-to-many wireless playback to high-end hi-fi. HDMI eARC on the A15+ and A25+ expands TV integration, while the A25+ adds Class G power, hi-res audio decoding up to 32-bit/384kHz, and a precision OLED display.
With pricing from $1,199.95 to $1,999.95, the series delivers advanced technology and flexible connectivity at a competitive level.
Price & Availability
The Arcam Radia+ series is expected to be available in early Q4 2025 at the following prices:
- ARCAM A5+ $1,199.95
- ARCAM A15+ $1,499.95
- ARCAM A25+ $1,999.95
Related Reading:
- Arcam RADIA Series ST5 Music Streamer & A25 Integrated Amplifier: Unboxing
- ARCAM Introduces Flagship Radia ST25 Streamer And SA35 / SA45 Streaming Amps: High End Munich 2024
- Arcam RADIA A25 Integrated Amplifier: The Audiophile System Builder
- First Look: ARCAM Radia Series Integrated Amps, CD Player And Streamer Bring HiFi To A New Generation
