Cambridge Audio MSX Sub 300 White

Powerful deep bass with precise control!

The Cambridge Audio MSX Sub 300 is a compact active hi-fi subwoofer for music, home cinema and demanding surround systems. Its built-in amplifier delivers 300 watts of power and drives an 8" active driver, supported by an additional 8" passive radiator. This combination moves large volumes of air, delivering deep, dynamic bass from a compact enclosure. An integrated DSP controls 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 analog 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. Even during demanding bass passages, plenty of headroom remains. Low frequencies are reproduced powerfully and with control, without the subwoofer taking up excessive floor space. This makes the MSX Sub 300 particularly well suited to larger living rooms and high-performance home entertainment systems.

8" active driver and 8" passive radiator

An active 8" driver handles the bass reproduction. An 8" passive radiator also operates inside the enclosure, helping to move large volumes of air efficiently. Together, they allow the subwoofer to reach a lower cutoff frequency of 31 Hz at -6 dB. Explosions, electronic bass lines, kick drums and deep film soundtracks gain the desired physical presence, while remaining precise and controlled.

Intelligent digital signal processing

The integrated DSP monitors and controls the frequency response and output signal in real time. This allows the MSX Sub 300 to deliver stable, clean low-frequency performance even at higher volumes. Digital signal processing helps maintain a controlled response, ensuring that deep frequencies are reproduced not just loudly, but with structure and musicality.

Variable crossover for optimal integration

The active crossover can be adjusted from 50 Hz to 200 Hz. This lets you precisely match the transition between the subwoofer and 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 from 0° to 180°. This setting helps you match the subwoofer to its position in the room and to your main speakers. Especially when placement options are flexible—beside furniture, in corners or in different listening-room positions—phase control enables more precise tuning and more even bass at the listening position.

Analog input and pass-through output

A pair of low-level analog inputs is provided for signal connection. The subwoofer also has a pair of analog pass-through outputs. This makes it easy to integrate into a variety of hi-fi, stereo and home cinema setups. The automatic power-on function adds convenience, as the subwoofer can switch on automatically when an audio signal is present.

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. It weighs 7.5 kg, allowing flexible placement in a living room or dedicated media room. Paired with compact satellite speakers, it extends the sound with deep frequencies, adding weight, dynamics and a greater sense of space to music and movies.

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