MartinLogan Dynamo 400 Audiophile Grade Subwoofer - Dreamedia AV
Vendor: MartinLogan

MartinLogan Dynamo 400 Audiophile Grade Subwoofer

Audiophile 8-inch subwoofer with deep, precise bass

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MartinLogan Dynamo 400 Audiophile Grade Subwoofer

Elevate Your Home Theater Experience with Deep, Resonant Bass

Imagine settling into your favorite chair, the lights dim, and as the opening scene of your favorite movie begins to play, you're not just hearing the soundtrack—you're feeling it. The rumble of the engines, the subtle vibration of the orchestral score, it's all brought to life by the MartinLogan Dynamo 400 Subwoofer. This isn't just any subwoofer; it's an audiophile-grade powerhouse designed to elevate your home entertainment to concert hall and cinema levels of immersion.

Exceptional Audio Quality

At the heart of the Dynamo 400 lies an 8-inch high-excursion, inverted surround, polypropylene cone, a sophisticated piece of engineering crafted to deliver the cleanest, most precise bass. This advanced-technology woofer, coupled with a ported cabinet design, ensures dramatic bass detail and attack with superb extension that can shake the room. Whether you're a fan of rock, jazz, country, or any other genre, the Dynamo 400's precise musicality and room-filling low frequencies will make you feel like you're at a live performance.

Key Features:

  • High-Performance Woofer: 8” high-excursion, inverted surround, polypropylene cone for detailed bass reproduction.
  • Powerful Amplification: 75 watts RMS, 150 watts peak power for impactful sound.
  • Optimized Frequency Response: 30–200 Hz ±3 dB, perfect for capturing the full range of bass tones.
  • Advanced DSP Engine: Enhances bass response and reduces distortion for clean, musical bass.
  • Versatile Input Options: RCA and speaker-level inputs for easy integration with any system.

Designed for Durability and Aesthetics

The Dynamo 400 isn't just about performance; it's also about design. The sleek satin black finish and compact size allow it to blend seamlessly into any room decor without taking up unnecessary space. It's built to last, with a sturdy construction that weighs in at 28.5 lbs., ensuring stability and durability. The removable grille allows for a front-fire configuration, providing flexibility in placement and ensuring optimal sound dispersion.

User-Friendly Controls and Connectivity

Ease of use is evident in every aspect of the Dynamo 400's design. The back panel offers simple, accessible controls for volume, low-pass filter, and phase switch, allowing you to tailor the sound to your room and preferences. With both RCA and high-level inputs, connecting to your existing amplifier or receiver is a breeze, even for vintage models without dedicated subwoofer outputs.

Energy-Efficient Operation

The Dynamo 400 is mindful of power consumption without sacrificing performance. The Class-D amplifier is efficient, drawing typically only 20W during operation, with a standby mode that reduces power usage to a mere 0.5W. This energy efficiency ensures that your subwoofer only uses the power necessary to deliver exceptional sound, making it both cost-effective and environmentally friendly.

Installation and Setup Made Simple

Dreamedia is here to assist you in integrating the Dynamo 400 into your home theater system. With our expertise, we can help design your setup to take full advantage of the subwoofer's capabilities, ensuring that you get the most out of your investment. The Dynamo 400 is designed for easy setup, so you can start enjoying deeper bass and a more immersive home theater experience right away.

The Perfect Complement to Your Home Theater

Whether paired with MartinLogan speakers or integrated into an existing system, the Dynamo 400 is designed to complement and enhance your audio landscape. It's particularly well-suited for small to medium-sized rooms, where its compact size and powerful output can fill the space without overwhelming it. The result is a balanced, dynamic soundstage that brings movies and music to life.

What Sets the Dynamo 400 Apart?

  • Precision Engineering: Advanced woofers and a DSP-engineered design deliver precise bass with minimal distortion.
  • Compact and Powerful: Though small in stature, the Dynamo 400 delivers room-shaking output and superb extension.
  • Flexible Placement: Ported, down-firing design and removable grille offer versatility in positioning without compromising on sound quality.
  • Exceptional Value: High-quality sound and deep bass at a price point that offers significant value to both audiophiles and casual listeners alike.

Peace of Mind with Warranty

Your investment in the MartinLogan Dynamo 400 is protected by a generous 3-year warranty, ensuring that you can enjoy deep, resonant bass for years to come. With quality components and built-to-last design, the Dynamo 400 is as reliable as it is powerful.

In summary, the MartinLogan Dynamo 400 Audiophile Grade Subwoofer is a testament to performance meeting precision. It's the ideal choice for those who want to experience the full emotional impact of their home entertainment without compromise. With the Dynamo 400, you're not just watching a movie or listening to music; you're partaking in an auditory journey that captivates and thrills.

Dreamedia is ready to help you embark on this journey, providing expert advice and personalized home theater design services. Let us help you transform your home entertainment into an experience that rivals the best cinemas and concert halls. With the MartinLogan Dynamo 400, your home theater will never be the same.

Our Review

MartinLogan Dynamo 400 8" 150W Audiophile Grade Subwoofer Review


In the quest for immersive audio in home theater systems, the subwoofer plays a pivotal role, delivering the low-frequency effects that add depth and realism to music and cinematic experiences. MartinLogan, a brand with a storied reputation among audiophiles, offers a range of subwoofers designed to meet various acoustic and aesthetic needs. The Dynamo 400 is positioned as an entry-level audiophile-grade subwoofer, promising to deliver MartinLogan's signature sound quality in a compact package.


Build Quality and Aesthetics

The Dynamo 400 is built with attention to detail, featuring a high-quality satin black finish that exudes a subtle elegance, allowing it to blend seamlessly into most home theater environments. The construction is solid, with a weight that suggests robust internal components without being overly cumbersome.

Compactness and Placement

Measuring 15.2" x 13.3" x 13.7", the Dynamo 400's compact size is a significant advantage. It offers flexibility in placement, which is critical in optimizing bass response and integrating the subwoofer into a variety of room sizes and designs. The down-firing port design aids in delivering clean and punchy bass, minimizing the impact of room acoustics on the sound.

Input and Output Options

Connectivity is straightforward with the Dynamo 400, featuring RCA line and speaker-level inputs. This range of inputs ensures compatibility with both modern and vintage amplifiers, though the lack of high-level outputs does limit the ability to easily integrate with certain speaker setups.


Advanced Technology Woofers

The 8” high-excursion, inverted surround, polypropylene cone is engineered for a clean, non-resonant response even at high volumes. This design allows for maximum excursion clearance and reduced airflow turbulence, contributing to the subwoofer's ability to articulate the nuances of bass in music and movies.

Amplification and Power Management

The internal amplifier is rated at 75 watts RMS, with a peak capability of 150 watts. In practice, this translates to a subwoofer that is efficient in its power usage, with a modest typical draw of 20W and an idle consumption of just 4W. For users concerned with energy efficiency, these figures are appealing.

Ported Design and DSP

The ported design of the Dynamo 400 is complemented by digital signal processing, which optimizes performance by tailoring the subwoofer's output to its environment. This DSP technology is instrumental in achieving the claimed frequency response of 30–200 Hz ±3 dB, which is commendable for a subwoofer of this size.


Sound Quality

For small to medium-sized rooms, the Dynamo 400 offers a sound that is rich and detailed, excelling particularly in precision music genres like rock, jazz, and country. The subwoofer complements MartinLogan's range of speakers well, ensuring a cohesive soundstage when used as part of a larger system.

Frequency Response and Bass Extension

The frequency response indicates a subwoofer capable of reaching the lower limits of human hearing. However, in larger rooms or at higher volume levels, the Dynamo 400 may not provide the same level of authoritative bass presence that some users desire, particularly for genres like hip hop or rap that rely on deep, extended bass.

Room Compatibility

In smaller spaces, the Dynamo 400 performs admirably, delivering dramatic bass detail and attack. However, it is less suited to larger rooms, where it may struggle to fill the space with a convincing low-frequency performance.

Volume and Dynamics

The subwoofer manages volume changes and dynamic shifts in soundtracks with competence, though at its limits, there have been reports of an annoying vibration rattle within the casing. For movie soundtracks demanding tight and punchy bass, the Dynamo 400 may not always satisfy, especially in action-packed scenes that require subsonic rumble and explosive impact.

Comparison to Competitors

When compared to other subwoofers in its price range, the Dynamo 400's strengths lie in its musicality and compact design. However, competitors may offer more powerful amplification or additional features like wireless connectivity, which are becoming increasingly common in this market segment.

User Experience

Setup and Ease of Use

Setting up the Dynamo 400 is a straightforward affair, with clear instructions and simple connectivity. The subwoofer's compact size and down-firing design offer flexibility in placement, making it easy to integrate into most home theater setups.

Reliability and Warranty

MartinLogan's three-year warranty is a testament to the company's confidence in the reliability of their products. The Dynamo 400 should provide years of consistent performance, which is an important consideration for consumers seeking a long-term audio investment.

Pros and Cons Recap

The Dynamo 400 shines with its clean and deep bass response, ease of setup, and compact size that makes it ideal for small to medium-sized rooms. It excels in delivering high-quality sound for both music and movies, particularly in genres that require precision rather than sheer power. However, its limitations become apparent in larger rooms or for users with extreme bass needs, where it may lack the power and versatility to satisfy all listening preferences.

Final Thoughts

The MartinLogan Dynamo 400 offers a cost-effective entry point into the world of high-quality bass reproduction. Its performance in smaller spaces, coupled with its musicality, makes it an excellent choice for discerning listeners who value clarity and detail. However, for those with larger rooms or a taste for bass-heavy genres, a more powerful subwoofer may be necessary to achieve the desired impact. In summary, the Dynamo 400 is a worthy consideration for users seeking to enhance their home theater experience with a subwoofer that balances quality with compactness, provided that its limitations are understood and accepted.


General Specifications

  • Model: DYN400D
  • Woofer Size: 8 inches
  • RMS Power: 75 watts
  • Peak Power: 150 watts
  • Frequency Response: 30–200 Hz ±3 dB
  • Low Pass Filter Frequency: 35–120 Hz
  • Phase: 0°/180°
  • Weight: 28.5 lbs. (12.9 kg)
  • Dimensions (H x W x D): 15.2" x 13.3" x 13.7"
  • Finish: Satin Black

Audio Specifications

  • Low Frequency Transducer: 8” (20.3cm) high-excursion, inverted surround, polypropylene cone
  • Impedance: RCA - 8,300 Ohms
  • Inputs: Line Level - Left, Right/LFE; Speaker Level - Left and Right via banana jacks
  • Controls: Level, Low Pass Filter, Phase Switch
  • Cabinet Design: Ported

Power Specifications

  • Amplifier Type: Class-D
  • Power Draw: Typical - 20W, Max - 90W, Idle - 4W, Standby - 0.5W
  • Power Mode: Auto/Always On


  • Feet: Rubber
  • Input Options: RCA and speaker level inputs
  • IME Filter: Yes
  • Port Design: Tuned, long low-turbulence
  • Grille: Removable, Front-fire mode

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