British audio company, ARCAM has announced the Radia Series loudspeakers, marking the brand’s return to speaker design. The speakers had their global debut at ISE Barcelona last week. The line-up includes two bookshelf models, a center channel, a subwoofer, and two floor-standers providing a complete solution for both music and home cinema setups. The speakers perform seamlessly with any high-quality hi-fi or home cinema system, with additional fine-tuning available when used alongside specific Radia electronics.

While ARCAM has focused primarily on electronics since its founding 50 years ago in Cambridge, loudspeakers are not new to the brand. In 1985, ARCAM introduced the “ARCAM Two” bookshelf speakers, and more recently, designed the Muso powered loudspeakers. With the Radia Series, ARCAM returns to loudspeakers, applying five decades of audio engineering excellence alongside the advanced research, measurement, and testing facilities available through HARMAN.

ARCAM also recently announced three AV amplifiers and an AV processor for the Radia Series, enabling fully integrated Radia multichannel sound systems.

“We are proud to launch the Radia Series loudspeakers,” said Mike Strange, Global Product Line Manager at ARCAM. “They complement the Radia Series perfectly and, thanks to our talented engineers and HARMAN’s world-class facilities, deliver the same remarkable standard of performance as our electronics. Our new loudspeakers integrate fully with ARCAM amplifiers and AV products, while excelling with any high-quality system.”

The Radia loudspeakers follow the established Radia design language, with a subtle yellow accent and cabinets finished in premium Black Walnut wood veneer. Magnetically attached grilles create a clean, uninterrupted front profile, while optional solid aluminum stands are available for the bookshelf models.

The Radia loudspeakers work seamlessly with other-brand electronics, but when paired with the ARCAM SA35 or SA45 streaming amplifiers, each speaker can be fine-tuned via ARCAM’s anechoic EQ (AEQ). The electronics’ output is automatically optimized to maximize accuracy of each speaker, enhancing sound quality within a straightforward home audio setup. AEQ will also be available on the upcoming Radia Series AV products, ensuring the entire range delivers its absolute best performance.

The cabinets are rigidly cross‑braced for stability and control. All five passive loudspeakers feature a 25 mm (1‑inch) DCC aluminum dome tweeter mounted in an Acoustic Lens waveguide. This waveguide improves dispersion and phase alignment, creating a more even sound across the listening area and a stable, well‑defined stereo image.

Low‑ and mid-frequency performance is handled by Micro Ceramic Composite (MCC) cone woofers, chosen for their combination of stiffness and low mass. The R15, R35, and R35C models use a 130 mm (5.25‑inch) MCC driver, while the larger R25 and R45 models employ a 165 mm version. 

Midrange duties are handled by Deep Ceramic Composite (DCC) drivers: the R35 uses a 130 mm unit, and the R45 a 165 mm unit. Completing the range, the R25B subwoofer features a 250 mm (10‑inch) coated fiber-composite cone woofer, delivering precise, controlled bass that brings both music and film soundtracks to life.

Radia Series by model

R15

The entry-level Radia bookshelf features a two-way crossover design, combining a 25 mm (1‑inch) DCC aluminum dome tweeter in an Acoustic Lens waveguide with a 130 mm MCC cone woofer. Like all Radia passive loudspeakers, it can be fine-tuned via an anechoic EQ when paired with the ARCAM SA35, SA45, or Radia AV products.

R25

The largest Radia bookshelf model also uses a two-way crossover, with a 165 mm MCC cone woofer and the same 25 mm tweeter used across the series in an Acoustic Lens waveguide. Its slightly larger cabinet accommodates the bigger woofer, supporting extended low-frequency response while keeping the speaker suitable for bookshelf placement.

R25B

The R25B subwoofer provides deep, controlled bass, whether used to enhance a 2.1 music system or as part of a full surround setup. It houses a 750-watt digital amplifier, driving a 250 mm (10‑inch) coated fiber-composite cone woofer.

R35C

The center speaker is a critical part of any surround sound system, often carrying around half of all on-screen dialogue. ARCAM has engineered the R35C to excel in this role, with a 25 mm (1‑inch) DCC aluminum dome tweeter mounted in an Acoustic Lens waveguide for wide, even dispersion and precise imaging, and a brace of 130 mm (5.25‑inch) MCC cone woofers for natural low- and mid-range presence.

R35

The R35 is the more compact floor-standing model in the Radia series, featuring a three-way crossover design. It uses a 25 mm DCC dome tweeter in the Acoustic Lens waveguide, three 130 mm MCC cone woofers for low frequencies, and a single 130 mm DCC cone midrange driver. Designed to pair seamlessly with the ARCAM Radia SA35, the R35 delivers precise imaging, balanced bass, and clear, natural midrange, making it ideal for smaller to medium-sized rooms or tighter setups.

R45

The R45 is the ultimate loudspeaker in the Radia Series, also employing a three-way crossover. It features three 165 mm MCC cone woofers for low frequencies, a 165 mm DCC cone driver for midrange, and a 25 mm DCC dome aluminum tweeter in the range’s Acoustic Lens waveguide. It is the ideal match for the ARCAM Radia SA45, offering authority, detailed imaging, and extended low-frequency response for larger rooms.

With the Radia Series loudspeakers, ARCAM brings 50 years of audio expertise to a fresh category. The range blends elegant design, precise engineering, and the versatility to perform across a wide variety of audio systems.

Pricing and availability

The ARCAM Radia Series loudspeakers will be available from authorized ARCAM dealers from Q2 2026, with products expected in stores by May. Canadian pricing will be determined by Erikson Consumer, the exclusive Canadian distributor for ARCAM

R15 (pair): £1,699 / €2,000 

R25 (pair): £2,599 / €3,000

R35 (each): £1,999 / €2,500

R45 (each): £2,999 / €3,500

R35C (each): £1,699 / €2,000

R25B (each): £2,599 / €3,000