KEF SR4Q 4.5” Uni-Q Outdoor Landscape Satellite Speakers (Set of 4)

Stock expected December 2026 - Pre-order now!

For more than six decades, KEF has been driven by a pursuit of acoustic excellence. Now, that same devotion breathes into the open air. Building on the groundbreaking technologies behind our award-winning HiFi speakers, KEF Outdoor Speakers are engineered to enrich every outdoor moment with the power of high-fidelity sound, bringing music and movies from indoors to outdoors without compromise.

Landscape P4Q 4.1 outdoor system elevates open air listening with next level clarity and detail. Four SR4Q 4.5" Uni-Q landscape satellites pair with the 8" BL8b bollard subwoofer, powered by the KASA 2-250M network DSP amplifier, to deliver superior acoustic control, extended dynamics, and precise system tuning.

Featuring KEF’s signature Uni-Q technology, the system creates a spacious, immersive soundstage with wide, even coverage across larger outdoor environments. Designed for expansive spaces, Landscape P4Q offers the flexibility to expand into an 8.2 configuration or scale further to suit larger outdoor areas as your needs evolve.

Designed to excel in all outdoor conditions, the speakers are UV-resistant and weather sealed to withstand intense sunlight, heavy rain, coastal salt, and extreme temperatures, ensuring pristine sound season after season.

Uni-Q® technology: precision-engineered for outdoors

For the first time, KEF’s renowned Uni-Q technology is available in an outdoor speaker range. The bespoke weatherproof 4.5-inch Uni-Q driver arrays are optimised for open-air environments, ensuring weather resistance without compromising performance.

By positioning the tweeter precisely at the acoustic centre of the bass and midrange cone, Uni-Q technology creates a single point source that delivers smooth, even sound dispersion. The result is a controlled, wide sound field that immerses everyone in high-fidelity sound, wherever they are in the outdoor space.

Built for all-weather durability

Engineered for year round durability, KEF’s outdoor speakers are housed in rugged, robust enclosures designed for long-lasting performance. Each speaker features an aluminium grille that shields the drivers from outdoor exposure, while the UV-resistant design ensures resilience against prolonged sunlight exposure.

Easy placement, seamless integration

Designed for maximum placement flexibility, KEF outdoor speakers offer a variety of mounting options to suit different outdoor environments. The landscape satellites can be installed using ground stakes for placement within garden beds and landscaped areas, or mounted on walls, eaves, or trees using surface mounts. The subwoofer can be positioned securely with ground stakes, with the option to partially bury the base for a more discreet appearance. For hard surfaces such as patios, decks, or concrete areas, hardscape mounts provide a stable and reliable installation solution.

Expertly tuned, elegantly crafted

Precisely tuned to KEF's unparalleled standards, KEF outdoor speakers are crafted to blend effortlessly into natural surroundings with a smooth, understated silhouette and a minimalist form. The tone-on-tone aluminium grille not only provides a premium finish but also enables wider sound dispersion, delivering an immersive listening experience across open spaces.

Amplified for high-fidelity

Built with precision for high performance amplification, KASA 2-250M delivers exceptional efficiency and outstanding signal purity, enabled by advanced Class D amplification enhanced by next-generation GaN technology. Powered by KEF's Music Integrity Engine® (MIE) and premium AKM Velvet Sound DAC/ADC architecture, it drives KEF speakers with exacting accuracy for natural, detailed, and immersive sound. Supporting single ended or bridged operation into 4- or 8-ohm loads, KASA 2-250M adapts effortlessly from focused listening zones to large-scale multi-zone installations.

4.5" Uni-Q driver array for accurate and pristine sound with even dispersion

Rugged, robust construction for all-weather durability

IP66-rated for dustproof and waterproof protection

UV-resistant design for protection against prolonged sunlight exposure

Wide operating temperature ranges from –25°C to +70°C

Salt spray tested for over 500 hours

Aluminium grille ensures reliable protection in challenging outdoor conditions

Versatile mounting options including ground stakes, surface mounts

Specification

Series      Landscape Satellite Speakers

Nominal impedance 1602

Sensitivity (2.83V/1m)  86dB

Frequency response (±6dB) with back can / rear enclosure 108Hz-20kHz  

Frequency range (-10dB) 93Hz -20kHz

Nominal coverage (degrees)    90°

Nominal Coverage Area   30m2

Max SPL (dB)      106dB

Crossover frequency     27 kHz

Drive units MF: 115mm (4.5 in.) Uni-Q, HF:19mm (0.75 in.)

Required amplifier      KEF Network DSP Amplifiers

Recommended amplifier power   150 W for 4 in parallel

Recommended high-pass filter (Hz)   110Hz

Recommended low-pass filter (Hz)    N/A

Product external dimensions(HxWxD)  160 x160x 186mm 

Product external dimensions (With wall bracket and knobs) (HxWx D)  232x 160x 269mm 

Product external dimensions (With Groundstake) (HxWxD)160x160x 562mm    

Net Weight  2.2Kg

Operating temperature range   -25℃ to 70℃ 

Safety and Regulatory Compliance    IP66