Cambridge Audio MSX SUB 300 Subwoofer

For more spacious living areas and sophisticated home entertainment systems, the MSX Sub 300 provides the foundation that truly brings deeper sonic layers to life. It was specifically designed to create a powerful, controlled, and musical bass base when paired with MSX loudspeakers – while also blending seamlessly into the wider Cambridge Audio product range. The Sub 300 delivers a palpable presence and impressive depth without visually or acoustically dominating the room.

Higher performance – tailored to control

The integrated 300-watt amplifier provides significantly increased power reserves and enables greater dynamic headroom. Even at higher volumes, bass reproduction remains powerful, defined, and clear. Instead of pure volume, the MSX Sub 300 focuses on a carefully balanced approach to energy and control: low frequencies unfold effortlessly while always maintaining their precision.

8' active driver with passive radiator

At its heart is a powerful 8-inch active driver working in conjunction with a passive radiator. This combination increases airflow efficiency, extends deep bass capability, and improves output – without the known drawbacks of bass reflex ports. The result is a confident, punchy low end that effortlessly fills even larger rooms without sacrificing accuracy.

Digital Signal Processing (DSP)

The integrated DSP monitors frequency response and output signal in real time. This ensures that the subwoofer remains stable and distortion-free, even during demanding film scenes or complex music passages. Every bass nuance is reproduced cleanly, with control and clarity – a crucial factor for large rooms where precision can quickly be lost.

Elegant compactness – for larger systems

Not every high-performance subwoofer has to look bulky. The MSX Sub 300 combines a restrained, timelessly elegant design with matte surfaces in black or white. Its clean lines allow for discreet integration, even in design-oriented living spaces. The proportions remain deliberately compact – powerful in sound, understated in appearance.

Greater bass impact – more physical presence

The Sub 300 delivers a depth and power that makes movies, series, and games noticeably more intense. Explosions gain realistic mass, atmospheric soundscapes acquire volume, and dark frequency ranges become tangible without ever becoming imprecise or overwhelming.

High-performance low-end for large rooms

Thanks to its larger driver and increased amplifier power, the MSX Sub 300 moves more air – and does so with an ease that creates a smooth, dynamic bass field even in significantly larger rooms. The sound remains full-bodied, powerful, and present, without any unpleasant resonances.

Cinematic low frequencies

The tuning for film and TV gives soundtracks a significant boost in atmosphere. Scenes appear more intense, realistic, and spatial without obscuring subtle details. It's not just about volume, but also depth, texture, and speed – and that's exactly what the MSX Sub 300 delivers.

Music with depth, timing, and structure

The Sub 300 also demonstrates its strengths musically: it adds extra substance to the foundation, emphasizes timing, and anchors every recording more firmly in the soundstage. The bass sounds grounded, tangible, yet finely controlled – ideal for demanding stereo setups.

Precise room and system adaptation

With its adjustable controls, the subwoofer can be precisely adapted to room geometry and speaker setup. Integration is effortless – whether in classic stereo systems, multi-channel installations, or dedicated media rooms. The result is a cohesive, immersive soundstage with seamless depth extension.

Designed for larger spaces

The MSX Sub 300 is particularly suitable for environments where stable, consistent bass distribution is required. Distortion is avoided, even when covering large areas – a crucial advantage for open-plan living spaces or expansive entertainment zones.

Cambridge Audio experience, made audible

Each subwoofer is custom-tuned by Cambridge Audio, based on decades of expertise. The result is a bass that combines musical precision with powerful presentation – a foundation that impresses without being overpowering.

Premium finish for modern interiors

The matte finish complements the design language of modern Cambridge Audio components and blends elegantly into high-quality living spaces. Subtle, sophisticated, timeless.

Perfect for larger systems

In combination with the MSX20 or in an expanded MSX speaker system, the Sub 300 noticeably increases headroom. Its compact footprint allows for flexible placement in room corners, next to furniture, or in dedicated media rooms – while maintaining consistently even bass reproduction.

Performance, controlled

The MSX Sub 300 combines deeper extension, more power, and ample headroom with a design that blends effortlessly into modern spaces. A subwoofer that combines size with precision – for demanding systems in spacious environments.

TECHNICAL DATA

• Drivers: 1 × 8' active, 1 × 8' passive radiator
• Frequency response: 31 Hz (-6 dB) – 200 Hz
• Crossover: Active, variable 50-200 Hz
• Phase control: Variable 0–180°
• Inputs: 1 × Low-level RCA pair
• Outputs: 1 × RCA pass-through pair
• Power output: 300 W
• Automatic switch-on: Yes
• Dimensions (W × H × D): 266 × 315 × 278 mm (10.4 × 12.4 × 10.9')
• Weight: 7.5 kg (16.5 lbs)
• Versions: Matte black, matte white
• Package contents: 1× speaker, power cable, safety guide, quick start guide, registration card