Cambridge Audio MSX Sub 300 Black

Powerful deep bass with precise control!

The Cambridge Audio MSX Sub 300 is a compact active hi-fi subwoofer for music, home theater and demanding surround sound systems. Its built-in amplifier delivers 300 watts of power to an 8" active driver, supported by an additional 8" passive radiator. This combination moves large volumes of air for deep, dynamic bass in a compact enclosure. An integrated DSP monitors the frequency response and output signal in real time. With a frequency response of 31 Hz to 200 Hz, a variable crossover, continuously adjustable phase control and coaxial audio connections, the MSX Sub 300 can be precisely matched to different speaker systems and rooms.

300 watts of active power

The built-in amplifier provides 300 watts of power, offering ample dynamic headroom for movie sound, music and gaming. There is still plenty of headroom during demanding bass passages. Low frequencies are reproduced powerfully and under control, without the subwoofer taking up unnecessary floor space. This makes the MSX Sub 300 particularly suitable for larger living rooms and high-performance home entertainment systems.

8" active driver and 8" passive radiator

An active 8" driver handles the bass reproduction, while an 8" passive radiator inside the enclosure helps move large volumes of air efficiently. This combination gives the subwoofer a lower cutoff frequency of 31 Hz at -6 dB. Explosions, electronic bass lines, kick drums and deep movie soundtracks gain the desired physical presence, while reproduction remains precise and controlled.

Intelligent digital signal processing

The built-in DSP monitors and controls the frequency response and output signal in real time. This allows the MSX Sub 300 to deliver stable, clean bass even at higher volumes. Digital signal processing helps keep reproduction controlled, ensuring that low frequencies are not just loud, but also well-defined and musical.

Variable crossover for optimal integration

The active crossover is adjustable from 50 Hz to 200 Hz. This lets you precisely match the transition between the subwoofer and your main speakers to your system. Compact satellite speakers benefit from a higher crossover frequency, while larger speakers can be crossed over lower if needed. The result is a smooth transition between the main speakers and the low-frequency range.

Variable phase control from 0° to 180°

The phase can be adjusted continuously from 0° to 180°. This setting helps you match the subwoofer to its position in the room and to the main speakers in use. Whether placed beside furniture, in a corner or in another position in the listening room, phase control allows for more precise adjustment and more even bass at the listening position.

Coaxial inputs and pass-through outputs

A pair of low-level coaxial inputs is provided for connecting the signal. The subwoofer also has a pair of coaxial pass-through outputs, making it easy to integrate into a range of hi-fi, stereo and home theater setups. The automatic power-on function adds convenience by allowing the subwoofer to switch on automatically when it detects an audio signal.

Compact solution for larger systems

Despite its capable 8" driver combination, the MSX Sub 300 remains relatively compact. Dimensions (W x H x D): 266 x 315 x 278 mm. Weight: 7.5 kg. This makes it easy to position in a living room or dedicated media room. Paired with compact satellite speakers, it extends the sound with deep frequencies, adding more foundation, dynamics and spaciousness to music and movies.

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