Sound

MartinLogan Depth 215: ultimate sub-bass machine with dual 38 cm-inch woofers and 2,200 W

20.08.2026 • 14h05

To crown the renewal of its legendary Depth subwoofer range, in addition to the Depth 212 model already presented in our pages, MartinLogan unveils a true acoustic monster: the Depth 215. This very high-end subwoofer pushes all limits with two immense 38 cm (!) drivers and dual amplification totaling 2,200 W RMS to make Home Cinema rooms shake.

If the American manufacturer aimed for versatility with the Depth 212 model, it designed a true sonic titan with the Depth 215 for consumers seeking physical impact and absolute dynamics. This subwoofer makes no compromise, taking up the brand’s famous BalancedForce architecture, with two enormous active 15" (38 cm) woofers mounted in opposition. This mechanical force-cancellation system blocks any transmission of energy to the massive cabinet (whose variable thickness from 1" to 3" guarantees total inertia). The result is absolute mechanical stability despite the beast’s exceptional weight, that of a dead donkey: 78.5 kilos. Yes, really!

MartinLogan Depth 215, the undisputed master of the 20-30 Hz range To drive these two immense drivers with authority, the Depth 215 relies on a muscular structure based on a dual Class D amplifier delivering a colossal 2,200 W RMS of power (up to 4,400 W peak). Benefiting from a generous internal volume, it drops to 18 Hz (±3 dB) with disconcerting ease and an almost negligible sense of effort. A true infrabass machine, it reproduces the critical 20-30 Hz range with phenomenal authority and solidity, ideal for Home Cinema.

To control this excess of energy with minimal distortion, the woofers use the new tri-layer Carbon Aerocore cone (ultra-rigid carbon fiber, ultra-light structural PMI foam for polymethacrylimide, a very high-tech synthetic polymer that comes in the form of a rigid foam used to create so-called “sandwich structure” composite materials) and damping fiberglass. The driver design goes even further with a cast aluminum chassis, triple venting (under the spider, the coil and the core), and a dual copper demodulation ring. The electronics, for its part, rely on an extremely powerful 64-bit [abc]DSP[/abc] Vojtko processor (500 MHz) compatible with the reference ARC Genesis room correction system (the calibration microphone is included).

MartinLogan Depth 215, invisible cooling and hidden touch interface In order to preserve a monolithic aesthetic worthy of its status, the engineers completely redesigned the back of the subwoofer. The amplifiers and the complete connectivity ([abc]XLR[/abc], [abc]RCA[/abc], high level, wireless) are hidden away (see photo below).

Cooling is done silently by convection thanks to superb extruded aluminum profiles acting as heat sinks (see photo above). At the front, a simple press beneath the backlit MartinLogan logo reveals a LED touch panel grouping all control functions together (see photo below), also accessible remotely via the MartinLogan Control Bluetooth smartphone app.

Availability announced for the end of August, in Gloss Black finish (lacquered black). Indicative price: 8,580 euros.

Key specifications of the MartinLogan Depth 215:

• Type: sealed subwoofer with BalancedForce architecture (drivers mounted in opposition)

• Power: 2,200 W (RMS)

• Amplification: dual Class D amplifier with convection cooling

• Driver(s): 2 x active 38 cm (15") woofers with cast aluminum chassis, tri-layer Carbon Aerocore cone (carbon fiber, PMI foam, fiberglass), triple venting and dual copper demodulation ring

• Max/peak power handling: 4,400 W

• Frequency response: 18 Hz - 120 Hz (± 3 dB)

• Variable active crossover: yes (adjustable low-pass filter from 35 Hz to 120 Hz in 1 Hz steps, 3rd order, 4th order or Bypass modes)

• Phase inverter: yes, continuously from 0°-180° (in 1° steps) and polarity inversion (Normal/Inverted)

• Connectivity: RCA line-level inputs (Left, Right, LFE), XLR line-level inputs (Left, Right, LFE), speaker-level inputs (Left/Right via banana plugs), 1 RCA Sub Out output

• Other: integrated wireless receiver with included transmitter, 64-bit 500 MHz Vojtko DSP, compatible with Anthem ARC Genesis room correction (microphone included), control via Bluetooth app or hidden LED touch interface, adjustable 20-30 Hz level (±10 dB), listening modes (Movie, Music, Night), Tone Sweep, integrated anti-vibration feet (decoupling spikes included)

• Dimensions (W x H x D): 580 x 572 x 595 mm (with feet)

• Weight: 78.5 kg