MartinLogan Depth i
Best compact subwoofer for audiophiles seeking precise, distortion-free bass performance.
Experience deep, impactful bass with the MartinLogan Depth i subwoofer, engineered for both high-end stereo music and multi-channel home theater systems. It integrates advanced technology into a compact cabinet, 40% smaller than its predecessor. The unique three-driver, force-canceling configuration eliminates cabinet resonance and bass blur, ensuring pure and precise sound reproduction. This subwoofer blends seamlessly with demanding speakers, delivering clean, tight, fast, and deep bass without unwanted bloat. It offers excellent build quality and flexible connectivity options for a superior audio experience.
$2195.00
Owner Satisfaction
4.7
/ 5
Category Rank
528
/ 7568
#528 in Speakers
Price vs Category Average
+50%
Above average
Frequency Response
201203
/ – Hz ± dB
Who it's for
- Audiophiles prioritizing precise, musical bass reproduction for critical listening
- Design-conscious homeowners needing a compact, elegant subwoofer solution
- System builders requiring precise integration and ample power headroom
Who should skip it
- Budget-focused buyers seeking high-value bass performance
- Home theater enthusiasts needing massive output for large rooms
- Bass lovers demanding deep, infrasonic performance below 20 Hz
Performance breakdown
Bass Precision
Force-canceling drivers deliver exceptionally tight and articulate low-end response.
Cabinet Resonance
Advanced engineering virtually eliminates unwanted vibration for pure sound reproduction.
Compact Footprint
Impressive power density packed into a surprisingly small, room-friendly cabinet.
Integration Capability
Blends seamlessly with high-end speakers for a cohesive sonic signature.
Build Quality
Robust construction ensures long-term reliability and premium aesthetic appeal.
Connectivity Versatility
Flexible input options accommodate diverse stereo and home theater setups.
Key Specs
Frequency Response
20–120 Hz ± 3dB
Amplifier Power Output
350W (continuous) / 900W (peak)
Low Frequency Transducer
Three 8" (20.3 cm) high-excursion aluminum cones
Impedance
RCA Line Level: 20,000 Ohms
Dimensions
17.9" x 17.1" x 16.5" (45.4 cm x 43.5 cm x 41.8 cm)
Weight
70 lb (31.8 kg)
Connectivity
RCA L/R Line Level, RCA LFE, Speaker Level inputs
Audio Controls
± 10dB at 25Hz
Features
- Three 8-inch drivers in force-canceling array
- Virtually eliminates cabinet resonance and bass blur
- Sophisticated amplifier and triple servo technology
- Compact cabinet design
- Provides deep, powerful, yet detailed bass
- Integrates electrostatic-type detail into bass
- Flexible connectivity options
- High-quality build for its price point
What customers say
The MartinLogan Depth i earns high praise for its exceptional low frequency performance. Customers consistently highlight its ability to produce deep, impactful bass that remains remarkably tight and musical across various content. Reviewers appreciate the powerful output delivered from its compact, sealed enclosure, noting its seamless integration into sophisticated audio systems. The subwoofer excels at reproducing both subtle musical nuances and explosive movie dynamics with precision. Build quality reflects its premium status. While the initial cost is substantial, the consensus confirms the Depth i provides a controlled foundation that significantly elevates the entire listening experience, justifying its high performance positioning.
Know before you buy
By positioning the three 8-inch drivers in a force-canceling array, the cabinet vibrations are effectively neutralized. This eliminates the 'bass blur' often caused by cabinet resonance, resulting in tighter, more precise, and cleaner low-frequency output.
The Depth i is engineered to excel at both. Its speed and precision make it ideal for high-end stereo music, while its ability to reach down to 20Hz ensures it provides the necessary impact and authority for demanding home theater soundtracks.
The subwoofer offers flexible connectivity, including RCA line-level inputs, a dedicated RCA LFE input for home theater processors, and speaker-level inputs for systems that require a high-level connection.
Despite being 40% smaller than its predecessor, the Depth i maintains high-performance output thanks to its sophisticated triple-servo technology and high-excursion drivers. It is an excellent choice for listeners who want deep, powerful bass without a massive footprint.
Yes, the unit features an audio control that allows for a ± 10dB adjustment at 25Hz. This helps you fine-tune the low-end output to better suit your room's specific acoustic characteristics.
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$2195