ARCAM R25B

Name: ARCAM R25B
Brand: Arcam
SKU: 72467
Price: 2999.00 CHF
Availability: BackOrder

Reference 72467

CHF2,999.00 Tax included

Supplier stock – typically 4 to 7 days

Arcam Radia series active subwoofer. 250 mm aluminum woofer, 750 W RMS Class D amplifier, variable crossover at 50–150 Hz, frequency response 26 Hz–150 Hz.

Description
Product Details

ARCAM R25B subwoofer on the floor next to floorstanding speakers in a living room

250 mm Woofer + 750 W Class D Amp

The 250 mm (10-inch) composite fiber-wound cone driver is mounted in a cast aluminum basket, a combination that maximizes linear excursion at high levels without motor geometry distortion. The 750 W RMS (1 500 W peak) Class D amplifier gives the woofer the power reserve to cleanly extend down to 26 Hz (±6 dB) — the register of electric bass, organ pedals, and film LFE effects. Even at high levels, bass control remains tight and fast.

Rear panel of the ARCAM R25B with crossover, volume and phase controls

Adjustable Crossover 50–150 Hz

The bass-pass filter is continuously adjustable from 50 to 150 Hz with a 24 dB/octave slope, providing enough latitude to optimize integration with bookshelf speakers with high crossover points (R15, R25) or floorstanders that already extend low (R35, R45). The phase control aligns the R25B temporally with the main speakers, eliminating partial cancellations in the transition band. The level control completes the trio of adjustments for a measurement-free setup.

Top-down view of the ARCAM R25B showing its rear port and magnetic grille

Bass-Reflex Enclosure, Dimensions

A bass-reflex cabinet rather than a sealed design allows deeper extension while retaining punch. The compact 430 × 437 × 377 mm footprint makes this active 250 mm sub manageable in a living room without visually dominating the space. The cabinet is finished in the same natural black walnut veneer as the rest of the Radia range, ensuring visual consistency in a full Radia system.

Close-up of the ARCAM R25B 250 mm woofer with suspension and aluminum basket

Magnetic Grille, Radia Finish

The magnetic grille attaches without visible fasteners, continuing the aesthetic lineage of R15, R25, R35, R45, and R35C. The RCA LFE/line input accepts the subwoofer output from an AV processor or integrated amplifier with a sub preamp. A 12 V trigger via 3.5 mm jack enables automatic power-up of the R25B from a compatible AV processor or amplifier, eliminating manual intervention for each listening session.

Reference 72467

Data sheet