Table of Contents
- Quick Start Guide – Integrated Amplifier with Bluetooth (Page 2)
- Guide de démarrage rapide – Amplificateur intégré avec Bluetooth (Page 5)
- Kurzanleitung – Integrierter Verstärker mit Bluetooth (Page 8)
- Snelstartgids – Geïntegreerde versterker met Bluetooth (Page 11)
- Guida di avvio rapido – Amplificatore integrato con Bluetooth (Page 14)
- Guía de inicio rápido – Amplificador Integrado con Bluetooth (Page 17)
- 빠른 시작 가이드 – 블루투스 통합 앰프 (Page 20)
- クイックスタートガイド - Bluetooth 搭載プリメインアンプ (Page 23)
- 快速入门指南 - 集成蓝牙放大器 (Page 26)
Package Contents
- ARCAM A25+ Integrated Amplifier
- ARCAM Radia IR Remote Control
- 2x AAA Batteries for the remote control
- Region Specific Power Cord(s)
- Safety and Compliance Booklet
- This Quick Start Guide
About ARCAM
The "A" in ARCAM stands for Amplification – this is our core competence.
ARCAM has been producing specialist Hi-Fi and home cinema products offering state of the art sound quality for over 45 years. The A25+ is the latest in more than 45 years of amplifier design and manufacture, going back to our first product in 1976 – the A&R Cambridge A60 amplifier. These amplifiers are designed to provide you with reliable amplification for decades to come, all with exceptional musicality so you get the most enjoyment from your music.
In the unlikely event of any fault, or you require technical assistance, please contact our dedicated support teams by email at luxurysupport@harman.com, or by telephone using +44 1707 668012 or +1 888 691 4171. Or, if you simply require further information about ARCAM products, our network of dealers will be happy to help you. Further information can also be found on the ARCAM website at ARCAM.co.uk.
Placing The Unit
- Place the amplifier on a level, firm surface, avoiding direct sunlight and sources of heat or damp.
- Do not place the A25+ on top of a power amplifier or other source of heat.
- The A25+ is designed to run warm during normal operation. Do not place the amplifier in an enclosed space such as a bookcase or closed cabinet unless there is good provision for ventilation.
- Do not place any other component or item on top of the amplifier as this may obstruct airflow around the heat-sink, causing the amplifier to run hot (the unit placed on top of the amplifier would become hot too).
- Make sure the remote-control receiver to the right of the front panel display is unobstructed, otherwise this will impair the use of the remote-control.
⚠️ The A25+ is designed to run warm in normal use, however extended use at high volume levels can result in the amplifier casework becoming hot to the touch.
When there is no audio input and no user operation, within 20 minutes, the unit will enter standby mode (⏻). This product offers the user the option to deactivate power management functions. Note that doing this will increase the energy consumption of the product.
Bluetooth Operation
- To pair your Bluetooth source device, select the BT input, open the Bluetooth settings on your source device, and scan for A25+ ###### from the list. Each product has a unique ID.
- By default, the amplifier does not need to be on the BT input to start Bluetooth playback of a paired device.
- The Amplifier can recall 5 device pairings. If 5 are in memory already, the oldest will be replaced.
- Because portable devices often have a volume slider, there is a maximum volume setting in the amplifier to prevent excessive volume output being selected accidentally. The default is 40.
- To pair Bluetooth headphones ?, press and select Audio Output. Paired Headphones will be listed.
- Bluetooth headphones cannot be used with the Bluetooth input source.
- To receive an Auracast broadcast, navigate to the BT Auracast input.
- To transmit an Auracast broadcast, press ?, select Audio Output, and select BT Auracast.
- To switch off the Bluetooth network, please go to BT SETTINGS -> BT AUTOSWITCH -> BT AUTO OFF and choose a non-Bluetooth input.
Front Panel
Input Control: Rotate the input carousel, Press to select, Press and hold to rename the current input.
Volume Control: Rotate the volume knob, Press to mute/unmute audio or wake the unit from standby (⏻), Press and hold for standby mode (⏻).
Rear Panel
Connections:
- Power Input: Connect the AC power cord here.
- CONTROL INPUT: For ARCAM Radia series source components only.
- Digital Audio Inputs: Connect digital audio sources (e.g., CD player, streamer).
- Phono (MM) Input: Connect a turntable with an MM cartridge.
- Analogue Audio Inputs: Connect analogue audio sources (e.g., CD player, streamer).
- Pre-Amp Output: Connect to an external power amplifier.
- Speaker Outputs: Connect your loudspeakers (Left and Right).
- HDMI eARC: For audio return channel from TV or other HDMI sources.
⚠️ Phono Ground: Connect to your turntable's ground wire to reduce hum. This terminal must not be used as a safety earth.
Remote Control
| Button/Function | Description |
|---|---|
| ⏻ | Standby On/Off |
| Left/Right: Input List. Middle button to select. | |
| Menu Navigation | |
| Volume Control | |
| Mute On or Off (?) | |
| Display On or Off | |
| Transport Keys (▶️/⏸️, Skip back/forward ⏭️) | |
| Settings Menu | |
| Audio Output Menu ? |
Note: Button representations are simplified for text-based display.
Connecting Loudspeakers
Connect your loudspeakers to the Amplifier's Speaker Outputs (Left and Right) using appropriate speaker cables. Ensure correct polarity (+ to + and - to -).
Specifications
| Feature | Specification |
|---|---|
| Continuous power output (0.5% THD+N), 2 channels | A25+ |
| 8Ω, 20Hz – 20kHz | 100W |
| 4Ω, 1kHz | 165W |
| Harmonic distortion, 80% power, 8Ω at 1kHz | 0.002% |
| Analogue Inputs | |
| Number of Inputs | 3 (RCA Pairs) |
| Signal/Noise ratio (A-wtd, ref. 50W, 1V input) | 106 dB |
| Frequency Response | 20Hz–20kHz ±0.2dB |
| Phono MM Input | |
| Input Impedance | 47kΩ + 100pF |
| Frequency Response (ref. RIAA curve) | 20Hz–20kHz ±1dB |
| Digital Inputs | |
| Supported sample rates (kHz) | USB-C Only: 384, 352.8, 192, 176.4, 96, 88.2, 48, 44.1 All other digital inputs: 192, 176.4, 96, 88.2, 48, 44.1 |
| Supported Bit depth | 32, 24, 16 |
| Frequency response (filter 1) | 20Hz–20kHz ± 0.2dB |
| Signal/Noise ratio (A-wtd, ref. 50W, 0dBFS) | 109 dB |
| Headphone Output | |
| Maximum output level (RMS) into 32Ω/300Ω | 2.5V/5V |
| Load range | 16Ω – 2kΩ |
| Bluetooth | |
| Bluetooth Profile | 5.4; A2DP Sink/Source, AVRCP, BLE, Snapdragon Sound, AAC, LE Audio, Auracast |
| Transmitter Frequency and Power | 2,400 MHz to 2,483.5 MHz: <20dBm |
| General | |
| Mains Voltage | 100V or 110–120V or 220–240V, 50/60Hz |
| Maximum power consumption | 500W |
| Standby power consumption | <0.5W |
| Network Standby power consumption | <2W |
| Maximum ambient operating temperature | 35°C/95°F |
| Dimensions W x D x H (including speaker terminals and feet) | 431 x 344 x 83mm |
| Weight (net) | 9 kg |
| Weight (gross) | 12 kg |
Acknowledgements
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. The Auracast™ word mark and logos are trademarks owned by the Bluetooth SIG, Inc. Any use of such marks by HARMAN International Industries, Incorporated is under license. Other trademarks and trade names are those of their respective owners.
Visit www.arcam.co.uk.
ARCAM is a trademark of HARMAN International Industries, Incorporated, registered in the United States and other countries.
© 2025 HARMAN International Industries, Incorporated. All rights reserved.
Features, specifications, and appearance are subject to change without notice.
HARMAN International, Incorporated
8500 Balboa Boulevard, Northridge, CA 91329 USA
Danzigerkade 16G 1013 AP Amsterdam, Netherlands
Ground Floor, Westside 2, London Road, Apsley, Hemel Hempstead, Hertfordshire, HP3 9TD, United Kingdom
ARCAM | Be the centre of the music
HARMAN International
ARCAM | Be the centre of the music
