MartinLogan Dynamo
Best hidden subwoofer for high-end outdoor entertainment spaces.
Elevate your outdoor audio with the MartinLogan Dynamo Outdoor Sub 120 Subwoofer. Designed for seamless landscape integration, it delivers powerful, deep bass with completely weather and water-proof construction. Its disappearing subterranean design offers a discreet audio solution, enhancing your outdoor living space without compromising aesthetics. Enjoy unmatched audio quality that transforms your backyard into an inviting entertainment hub, perfect for gatherings. Experience robust sound that withstands the elements, creating a truly immersive outdoor listening environment.
$2699.99
Owner Satisfaction
4.6
/ 5
Category Rank
2277
/ 8447
#2277 in Speakers
Price vs Category Average
+84%
Above average
Frequency Response
281203
/ –Hz ±dB
Who it's for
- Homeowners living in challenging or unpredictable climates
- Entertainers hosting large gatherings in expansive outdoor spaces
- Landscapers seeking seamless integration into custom garden designs
Who should skip it
- Budget-conscious buyers seeking affordable backyard audio solutions
- DIY enthusiasts lacking experience with professional-grade electrical installation
- Owners of compact patios or minimalist outdoor living areas
Performance breakdown
Bass Depth
The 12-inch driver reaches impressively low frequencies for outdoor environments.
Weather Resilience
Subterranean construction ensures total protection against the harshest outdoor elements.
Aesthetic Integration
Disappearing design keeps your landscape clean and free of bulky hardware.
Installation Complexity
Requires significant excavation and professional planning for proper subterranean placement.
Power Flexibility
Wide amplifier compatibility allows for easy integration into existing audio systems.
Build Durability
High-density polyethylene enclosure stands up to extreme temperatures and moisture.
Key Specs
Frequency Response
28–120Hz ±3dB
Recommended Amplifier Power
20—1000 watts per channel
Sensitivity
Room: 91 dB, Anechoic: 85 dB
Impedance
8 ohms (Compatible with 4, 6, or 8 Ohm rated amplifiers)
Low Frequency Transducer
12” (30.5cm) mineral filled poly cone, 2.5” (6.4cm) high-power oversized voice coil, 4-layer on fiberglass bobbin
Weight
62 lbs. (28.1 kg)
Dimensions (barrel only)
15.8″ x 15.8″ x 20.1″ (40cm x 40cm x 51cm)
Dimensions (canopy)
8.6″ x 14.3″ x 14.3″ (21.8 cm x 36.2cm x 36.2cm)
Features
- Completely weather and water-proof construction
- Disappearing subterranean installation design
- Durable high-density polyethylene enclosure
- Delivers deep, musical bass performance
- Tested for extreme temperatures and underwater use
- Scalable system design for expansion
- 12-inch mineral-filled poly cone woofer
- Low-heat design with vented port
What customers say
Customers overwhelmingly praise the MartinLogan Dynamo Outdoor Sub 120 for its exceptional outdoor audio performance and robust build quality. Reviewers consistently highlight the powerful deep and articulate bass it delivers, significantly enhancing entertainment areas without distortion, even at high volumes. The durability and weather resistance are key strengths, instilling confidence in its outdoor longevity. While the initial cost is premium, users feel the superior performance and solid construction fully justify the investment. This subwoofer is recognized as a top tier solution for achieving uncompromised, immersive low-end sound in open air settings.
Know before you buy
No, this is a passive subwoofer. You will need to provide an external amplifier to power it, with a recommended power range of 20 to 1000 watts per channel.
The subwoofer is designed to be buried in the ground, leaving only the canopy visible above the surface. This allows the unit to blend into your landscaping while using the earth to reinforce the bass performance.
Yes, the enclosure is constructed from high-density polyethylene and has been rigorously tested for both extreme temperature fluctuations and underwater use, ensuring it remains protected against rain, irrigation, and seasonal weather changes.
Absolutely. The system is designed to be scalable, so you can add multiple units to achieve more uniform bass coverage across larger outdoor spaces.
Because the unit is built with a durable, weather-proof enclosure and a vented port design, it requires very little maintenance. You should periodically ensure the canopy remains clear of debris like leaves or mulch to maintain optimal airflow.
It is compatible with most standard amplifiers rated for 4, 6, or 8 ohms. As long as your amplifier can provide the necessary power and you have a way to manage the crossover frequency, it will integrate seamlessly with your existing outdoor speakers.
Still have a question?
Ask Hayley anything about this product before you decide.