Additional information



Subwoofer Size

8 Inch

Shopper Award

MartinLogan Dynamo 400 Subwoofer

MartinLogan Dynamo 400 Subwoofer



In The Continental US

5-Year Warranty

On All Speakers

No Sales Tax!

SKU dynamo400 Categories , Brand:
Th Dynamo 400 features a 150 Watt amplifier, RCA speaker level input options, and an 8-inch audiophile grade woofer. Enhance your home theater and music experience with phenomenal bass detail and attack and room-shaking output.

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All items we sell are New and 100% Genuine products!

Price Match Guarantee

We guarantee to match any out-the-door lower price!

Hassle Free Returns

20-Day Returns on all products (Check store policy for more details)


  • The Dynamo 400 subwoofer features left and right input via RCA line and speaker level connections. Its right inputs double as and LFE input for home theater applications.
  • The newest MartinLogan Dynamo subwoofers include inverted surrounds and strong magnet, motor, and suspension designs.
  • The front-fire mode maximizes excursion clearance behind the grill cover with the unique inverted surround design. In a down-firing configuration, the inverted surround significantly reduces airflow related turbulence for an articulate and detailed low-frequency experience.
  • The advanced woofers pair a high-power magnet structure with low-mass diaphragms, providing massive excursions while preserving the smallest bass detail.
  • The remarkable damping properties of the 8-inch inverted surround poly cone woofer ensure a smooth, non-resonant response for seamless blending.
  • The Dynamo subwoofer class-D amplifiers function with extremely low levels of distortion and deliver a staggering low-frequency performance and dynamic impact with plenty of overhead. Low-noise, high-power switching power supplies create clean power efficiently in a small space while providing tremendous levels of current. The amplifiers feature high-quality MOSFET transistors, transformers, noise-suppression networks, and control circuitry.
  • The Inverse Mathematical Equalization (IME) Filter is used from the inverse of the unfiltered driver response. IME filtering yields extremely accurate low-frequency response that is superior to that provided by second-order high-Q filters found in other subwoofers of this price range.



Free Shipping within the Contingent United States can typically take 1-2 full weeks for delivery (or sooner).
Once your product ships out we will ALWAYS email you a tracking number for your convenience to be able to track online.

Air and Ground shipment time frames are business days only, and exclude weekends and/or holidays.
Orders outside the 48 continental States require Second Day or Next Day Air service.


NationwideStereo.com does not assess duties for international orders and they are subsequently subject to applicable customs, import duties and taxes, which are the sole responsibility of the customer. Please contact your local customs office for details.

  • Nationwide Stereo guarantees you the utmost in quality, authenticity, and reputability
  • 20 Day Return Policy*
  • No sales tax charged as we are located out of a non sales tax state
  • 1-5 Year NationwideStereo Hassle Free Replacement Warranty on all items
At Nationwidestereo.com, your complete satisfaction is important to us. If for any reason you are not 100% satisfied with your purchase simply create an RMA under our Contact Us Page & send your item back to Nationwide Stereo in its new, unused condition, with original packaging and we will be happy to provide you with either a partial refund of the purchase price or a store credit toward an exchange (excluding shipping & handling charges). Some conditions may apply. Please read our full return policy.
Our Products:
  • are authentic, never used, in the original box with manuals.
  • have a 1 to 5 year warranty program (see our warranty section for details).
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Do the products you sell have a warranty?

Yes all products we sell come with an equivalent to manufacturer warranty for the same time duration as the manufacturer would supply you with.  If you ever experience an issue with your item purchased from us, you will simply have to contact us for repair or replacement on your product within the warranty time period*


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