Cambridge Audio SX120 70W Subwoofer - Dreamedia AV
Cambridge Audio SX120 70W Subwoofer - Dreamedia AV
Cambridge Audio SX120 70W Subwoofer - Dreamedia AV
Cambridge Audio SX120 70W Subwoofer - Dreamedia AV
Cambridge Audio SX120 70W Subwoofer - Dreamedia AV
Vendor: Cambridge Audio

Cambridge Audio SX120 70W Subwoofer

70W RMS subwoofer with precision bass

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Cambridge Audio SX120 70W Subwoofer

Unveiling the Heartbeat of Your Home Theater: The Cambridge Audio SX120 Subwoofer

Imagine the deep, resonant pulse of a bass line that you can almost feel in your chest, the thunderous roll of a distant storm in your favorite movie, or the precise low-end punch that gives your music a live performance vibe. The Cambridge Audio SX120 Subwoofer makes these experiences not just a possibility, but a daily reality in your home theater setup.

The Core of Sonic Purity

Crafted with meticulous attention to detail, the SX120 is engineered to seamlessly integrate with your existing audio system, adding an extra layer of depth and dimension to your auditory experience. Let's delve into the features that make this subwoofer a standout choice:

  • Custom 8-inch Long-Throw Woofer: At the heart of the SX120 lies a custom-designed 8-inch long-throw woofer. This powerful driver is built to move a lot of air, resulting in a bass response that is both deep and precise.
  • Bass Reflex Enclosure with Dual Rear-Firing Ports: The carefully designed MDF cabinet with dual rear-firing bass reflex ports not only ensures the structural integrity of the subwoofer but also contributes to the tight and punchy bass. This design minimizes distortion and maximizes performance.
  • Robust Amplifier Output: With a 70 watts RMS power output, the integrated amplifier delivers consistent and dynamic bass, capable of filling your space with the kind of sound that you can feel as much as hear.
  • Fine-Tuning Controls: Individual volume, crossover frequency, and phase adjustment knobs allow you to tailor the sound to your room and taste, ensuring the subwoofer blends perfectly with your speakers.
  • Auto On/Off: The subwoofer intelligently powers down when not in use, saving energy and offering convenience without the need to manually switch it on and off.

Design That Speaks Volumes

Beyond its sonic abilities, the Cambridge Audio SX120 is a marvel of design:

  • Compact and Stylish: Its black matte finish and compact dimensions (300 x 300 x 310mm) ensure that it fits discreetly into any room, complementing your décor and existing audio equipment.
  • Adjustable Spiked Feet: These provide stability on carpeted floors, ensuring the subwoofer stays firmly in place, delivering consistent performance.

The Experience

With the SX120, every listening session becomes an event:

  • For Music Lovers: If you enjoy the nuances of a double bass in a jazz ensemble or the raw energy of an electronic beat, this subwoofer will add that necessary bass foundation that makes music come alive.
  • For Movie Buffs: Experience the full impact of cinematic soundtracks as the SX120 lends gravitas to every explosion and adds realism to the rumble of engines in high-speed chase scenes.
  • For Gamers: Feel the intensity of in-game action with bass that puts you right in the center of the battlefield or racing track.

Connectivity and Compatibility

  • RCA/LFE Input: Gold-plated left and right RCA line-level inputs ensure a high-quality connection that preserves audio integrity.
  • Versatility: Whether you're pairing the SX120 with Cambridge Audio's SX series speakers or another brand, you can rest assured of a harmonious and enriching sonic experience.

Assurance and Reliability

  • Warranty: With a 5-year warranty for the speaker and a 3-year warranty for the amplifier and labor, Cambridge Audio demonstrates its commitment to quality and customer satisfaction.

The Dreamedia Touch

At Dreamedia, we understand the importance of a tailored home theater experience. Our experts are available to design a system that incorporates the SX120, ensuring it performs at its best in your unique space.

Installation and Setup

  • Ease of Use: Setting up the SX120 is straightforward. With clear markings and instructions, you can have it up and running in no time.
  • Fine-Tuning: The control knobs are intuitive, allowing you to adjust the performance for the ideal balance and integration with your main speakers.

Enhancing Your Lifestyle

  • Seamless Integration: The SX120 is more than just a subwoofer; it's a lifestyle upgrade that brings a new level of enjoyment to your audio experiences.
  • Energy-Efficient: The auto on/off feature means the subwoofer is only active when you need it, helping to reduce energy consumption without sacrificing convenience.

Customer Satisfaction

Our customers rave about the clear, tight, punchy bass that the SX120 delivers, noting significant improvements in their listening experiences, whether for music, movies, or gaming.

Flexible Placement

Thanks to its compact design and port configuration, the SX120 offers a degree of placement flexibility that is uncommon in subwoofers of this caliber. Whether placed in a corner or along a wall, it delivers consistent performance.

Main Benefits at a Glance

  • Deep, Musical Bass: Provides an excellent foundation for any audio experience.
  • Tailorable Sound: Fine-tune your audio with controls for volume, crossover frequency, and phase.
  • Energy Conscious: Features an auto on/off for power saving.
  • Design Synergy: A perfect match for the SX speaker range, enhancing both aesthetics and acoustics.
  • Compact: Lightweight and easy to position within any home theater setup.

Your Next Step

The Cambridge Audio SX120 Subwoofer stands ready to redefine your home theater experience with its deep, rich bass and precision control. With Dreamedia's expertise, integrating this exceptional piece of audio technology into your life is seamless and satisfying. Embrace the heartbeat of your home theater today, and elevate your sonic landscape to spectacular new heights.

Our Review

Cambridge Audio SX120 70W Subwoofer Review


A subwoofer is an essential component of any home theater or audio system, designed to reproduce the lowest of audible frequencies and provide the depth and impact necessary for a truly immersive listening experience. Cambridge Audio, a well-respected name in the hi-fi industry, brings its expertise to the table with the SX120 subwoofer. Known for balancing performance with value, Cambridge Audio's offerings have garnered attention for their sonic excellence and build quality.

Design and Build Quality

The Cambridge Audio SX120 boasts a sleek, understated design that should blend seamlessly into most home environments. Finished in a neutral black, the unit is compact and unobtrusive, allowing for versatile placement within a room. Measuring 11-11/16 inches in width and height, with a depth of 13-3/4 inches, it's a sizeable unit that promises substantial bass output without dominating the floor space.

The build is solid, with a weight of 17 lbs. that speaks to the quality of materials used. The enclosure is made of rigid MDF, which is known for its durability and acoustic properties. The connectors and controls are high-grade, with gold-plated RCA line-level inputs ensuring a secure and high-quality connection.

Physical Layout

The SX120 features an 8" long-throw woofer, positioned frontally, with dual rear-firing ports that enhance the bass reflex. This design is key to the subwoofer's ability to produce deep, impactful bass. However, the rear placement of the controls may pose a challenge for adjustments once the unit is in place.


With an amplifier output of 70 watts RMS, the SX120 is capable of delivering authoritative bass. The frequency response is rated at 34-150 Hz, which is impressive for a subwoofer in this class, promising to reach into the lower depths of the bass spectrum.

The custom 8-inch long-throw driver is a standout feature, engineered for extended bass response while maintaining control and reducing distortion. The bass reflex enclosure and meticulously designed ports work in concert to produce clear, tight, and punchy bass.

Control features are comprehensive, with knobs for volume, crossover frequency, and phase adjustment, allowing users to tailor the bass output to their preferences and room acoustics. The Auto On/Off feature is a convenient addition, enabling the subwoofer to power down when not in use, saving energy.

Connectivity Options

The SX120 is equipped with RCA/LFE input, catering to a straightforward connection to most modern receivers. However, the absence of speaker-level inputs and wireless capability might limit connectivity options for users with older equipment or those seeking a cable-free setup.

Compatibility and Integration

This subwoofer is designed to complement Cambridge Audio's SX series speakers but is also engineered to work well with other brands. Its versatility and tailorable controls make it a good match for various audio systems, allowing for a cohesive integration into an existing setup.


The sound quality of the SX120 is notable, with a bass response that is both deep and articulate. The subwoofer handles the nuances of music and the demands of movie soundtracks with ease, providing an added layer of realism to the listening experience.

Power and Volume

The 70W RMS amplifier is potent for a subwoofer of its size, ensuring that the SX120 can produce significant volume without strain. The power consumption peaks at 100W, which is reasonable for the performance offered. The custom driver and powerful amplifier combine to deliver premium sound quality that belies the subwoofer's modest footprint.

Calibration and Setup

While the SX120 is designed for ease of use, achieving optimal performance may require some effort in terms of calibration. Users will need to fine-tune the volume, crossover frequency, and phase to match their room and main speakers. While this is a common requirement for subwoofers, the lack of remote control functionality means that adjustments must be made manually on the unit itself, which can be cumbersome.

User Experience

The Auto On/Off feature enhances the user experience by simplifying power management. However, the rear placement of the controls can be a point of contention for some users, as it makes on-the-fly adjustments less accessible.

Maintenance and Support

Cambridge Audio offers a 5-year warranty on the speaker and a 3-year warranty on the amplifier and labor, which is an indication of the company's confidence in its product. However, some users have reported difficulties in contacting customer service for support and issues with missing parts, which can mar the overall experience.

Final Thoughts

The Cambridge Audio SX120 subwoofer is a compelling option for those looking to enhance their audio system with deep and rich bass. Its strengths lie in its sound quality, extensive control features, and compatibility with a wide range of speakers. While it lacks some conveniences like wireless connectivity and speaker-level inputs, its performance-to-price ratio makes it a strong contender in its category. Potential buyers should consider their specific setup requirements and be prepared to spend some time calibrating the subwoofer for the best results. Overall, the SX120 offers a focused design approach and high performance at a competitive price point, making it a valuable addition to most home audio systems.


General Specifications

  • Model: Cambridge Audio SX120
  • Type: Subwoofer
  • Color: Black Matte
  • Dimensions (WxHxD): 300 x 300 x 310mm
  • Weight: 7.7kg

Audio Specifications

  • Frequency Response: 34Hz - 150Hz
  • Sensitivity: 180mV for full power output
  • Rated Output Power: 70W
  • Crossover: 50 - 150Hz continuous/active

Amplifier Specifications

  • Integrated Amplifier: Yes
  • Amplifier Power (RMS): 70W
  • Max. Power Consumption: 100W

Woofer Specifications

  • Woofer Size: 8 inches
  • Woofer Composition: Treated Paper
  • Woofer Type: Long-throw

Design Specifications

  • Cabinet Design: Ported
  • Bass Reflex Ports: Two
  • Firing Direction: Front


  • Preamp-Level Inputs: Stereo RCA/LFE


  • Volume Control: Rear-panel rotary
  • Low-Pass Crossover Frequency: 50-150 Hz
  • Phase Switch: Yes
  • Auto On/Off: Yes

Additional Features

  • Design Approach: Focused for premium sound quality
  • Bass Frequency Adjustment: Yes
  • Control Knobs: For fine-tuning performance
  • Protective Grille: Optional
  • Spiked Feet: Adjustable for stability

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