Product Description
The Depth 215 is the ultimate expression of MartinLogan bass technology. The culmination of our decades of experience in designing high-performance subwoofers. Depth subwoofers are meticulously engineered to deliver powerful bass as cleanly as possible, making them an ideal choice for both dedicated two-channel systems, home theater, or anything in between. Depth 215’s force-canceling dual 15” woofer layout all but eliminates performance-robbing cabinet resonances, allowing the custom Carbon Aerocore woofers to deliver pure bass energy without coloration. The system is backed by dual high-power, ultra precise amplifiers controlled by a class leading 64-bit Vojtko DSP engine. Every aspect has been painstakingly designed for maximum dynamic output capability, vanishingly low distortion, and exceptional accuracy.
Luxury Class Performance and Design
Depth Series subwoofers are designed to blend uncompromising low-frequency performance with timeless, luxurious design. Each Depth subwoofer begins with a massively overengineered cabinet, expertly sculpted to attain a modern, yet elegant facade, resulting in the perfect fusion of both form and function. The intent of Depth subwoofers is to deliver exceptional bass reproduction with a visually captivating design, proving extraordinary performance and exquisite style don’t have to be mutually exclusive.
BalancedForce Woofer System
To withstand the vigorous forces generated inside them, it’s imperative for speaker cabinets to maintain their strength and rigidity to avoid coloration, ensuring they produce the purest sound possible. Generating bass creates even more volatile forces, making subwoofer cabinets more susceptible to vibrations or resonance, which can blur or smear low frequencies. Depth subwoofers address this problem with our signature distortion-reducing BalancedForce woofer topology. The Depth 212 incorporates dual active 12-inch woofers positioned so they operate in exact opposition from one another. The equal and opposite forces of the woofers effectively cancel out the energy that would typically be transferred into the cabinet. This design cuts out the blur, smearing, and distortion caused by cabinet resonance, leaving only pure, articulate bass energy. This configuration not only enhances the sound and output, but the lower distortion means Depth subwoofers seamlessly blend into the room regardless of the content or volume, making Depth the ideal choice to pair with reference grade loudspeakers for the ultimate full-range audio experience.
Carbon Aerocore Woofers
To achieve the heightened levels of detail and articulate bass the Depth 212 is capable of, MartinLogan engineers designed a very special cone material; Carbon Aerocore. To prevent unwanted cone resonances and ringing, the tri-layer Carbon Aerocore woofers use layers of dissimilar materials to dampen and strengthen the cone for maximum fidelity. The outer layer is made of integral carbon fiber, known for its extreme strength and light weight. The middle layer is a PMI foam core, a cross-linked rigid structural foam chosen for its incredible strength and extremely low mass. The back layer is composed of fiberglass, further dampening the cone without adding appreciable weight. The result is a cone that is both incredibly strong and stable, yet extremely lightweight and nimble. Able to play the most nuanced passages with precision and authority. Afterall, what good is power without control? To further enhance both performance and reliability, the woofers are triple vented and feature dual copper shorting rings to further suppress distortion to inaudible levels.
Convection Cooled Concealed
Amplifier Design
With Depth, MartinLogan designers wanted every side to be ‘the good side’ and chased the wild notion of treating the back of the sub as an opportunity to improve both performance and aesthetics. The team came up with an elegant solution; a completely concealed amplifier design utilizing convection cooling to help keep things running at optimal levels. The decorative trim pieces on the back edges of the cabinet are actually extruded aluminum heatsinks. These also intake cool air from the room while exhausting the hot air generated by the amplifier, further reducing operating temperatures during the most demanding content. In another fusion of form and function, the inputs are located on the rear bottom edge of the subwoofer, neatly concealed inside an extruded aluminum trim piece. This allows for more discrete cable management by placing the cables closer to the floor while also providing ample clearance to accommodate a variety of power and signal cable options.
