Arcam Radia R25B Premium 750 Watt 10 Inch Subwoofer Black

Arcam Radia R25B – Premium 750W 10” High Excursion with Class D Amplification Subwoofer (Black)

The Arcam R25B is built to be the heartbeat of any Radia system, adding scale, depth and authority to your music and movies. Designed to partner perfectly with Arcam’s Radia speakers and home cinema amplifiers, this powerful yet relatively compact subwoofer brings a solid foundation to your sound without overpowering the room.

Whether you’re enjoying a cinematic soundtrack or a tightly produced studio recording, the R25B delivers bass that feels controlled, purposeful and deeply immersive.

Deep, Controlled Bass from a High-Excursion 10” Driver

At the core of the R25B is a 250mm (10-inch) high-excursion woofer, built using a coated fibre-composite cone. This lightweight yet rigid construction allows the driver to move freely and accurately, even at higher volumes, helping to reduce distortion while maintaining punch and clarity.

Mounted within a rigid cast aluminium chassis, the driver is capable of reaching impressively low frequencies – down to 26Hz – giving your system the kind of weight and scale that transforms both film and music playback.

750 Watts of Class D Power

Driving the woofer is a 750 watt RMS Class D amplifier (1,500 watts peak). This high-efficiency digital amplification provides excellent grip and control, ensuring bass notes start and stop cleanly. The result is not just loud bass, but precise, well-defined low frequencies with real dynamic impact.

From subtle atmospheric effects to full-scale action sequences, the R25B delivers confident low-end performance with plenty of headroom.

Tuned for Seamless System Integration

The R25B is designed for easy integration into both dedicated Radia setups and mixed systems. Adjustable volume, crossover and phase controls allow you to fine-tune performance to suit your room and main speakers.

• Match the bass level to your space
• Blend smoothly with bookshelf or floorstanding speakers
• Optimise timing with switchable phase control

Its bass-reflex tuned enclosure further enhances low-frequency extension while maintaining composure and balance.

Refined Design to Match the Radia Series

Visually, the R25B mirrors the clean, modern styling of the Radia range. Attention to detail extends beyond aesthetics:

• Inverted surround and trim ring cover to conceal fixings and reduce cabinet diffraction
• Magnetically attached grille for a neat, uninterrupted front profile
• Premium black finish for a discreet, elegant presence

It’s a subwoofer that looks as refined as it sounds.

The Perfect Foundation for Your Radia System

If you’re building or upgrading a Radia speaker system, the Arcam Radia R25B is the natural low-frequency partner. It adds depth, scale and authority without compromising control, helping your system deliver a more complete and engaging performance.

For music lovers and home cinema enthusiasts alike, the R25B brings every rhythm, impact and cinematic moment to life — with power you can feel and precision you can trust.

Technical Specifications

General
- Type: Subwoofer
- Cabinet finish: Black natural walnut veneer
- Enclosure tuning: Bass-reflex via rear-mounted port

Driver and Amplification
- Driver: 250 mm (10 in) coated fibre-composite cone driver in a cast aluminium frame
- Amplifier power: 750 W RMS / 1500 W peak power

Audio
- Crossover frequencies: 50 Hz–150 Hz (variable), 24 dB/octave
- Frequency response (±6 dB): 26 Hz–150 Hz

Inputs and Controls
- Inputs: RCA LFE/line level, 3.5 mm 12 V trigger
- Controls: Auto power, crossover, level, phase

Power
- Mains voltage (V/Hz): 100–120 V or 220–240 V, 50–60 Hz
- Power consumption: 205 W
- Standby power consumption: <0.5 W

Dimensions and Weight
- Dimensions (W x D x H): 430 x 437 x 377 mm (16.9 x 17.2 x 14.8 in)
- Product weight (each): 27.8 kg (61.3 lbs)
- Shipping weight: 35.2 kg (77.6 lbs)
- Shipping units of measure: Each

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