MartinLogan Dynamo 400 subwoofer front quarter
MartinLogan Dynamo 400 subwoofer front
MartinLogan Dynamo 400 subwoofer profile
MartinLogan Dynamo 400 subwoofer rear quarter
MartinLogan Dynamo 400 subwoofer rear
MartinLogan Dynamo 400 woofer closeup

MartinLogan Dynamo 400 | Audiophile Subwoofer

Regular price$499.00

MartinLogan brand logo black and red

Experience Audiophile-grade Bass with the Dynamo 400 from MartinLogan's Dynamo® Series

  • 150 Watt (peak) amplifier with 8" audiophile grade woofer
  • RCA and speaker level inputs
  • Features inverted surround, Ported design, and powerful, advanced magnet, motor, and suspension designs
  • Dramatic bass detail and attack, superb extension, and room-shaking output ensure a compelling music and home theater experience
  • Currently only available in Satin Black

MartinLogan Dynamo 400 subwoofer closeup with cover removed

Input Options

Left and Right 2-Channel Inputs
Dynamo 400, 600X, 800X, 1100X, and 1600X subwoofers feature left and right input via RCA line level as well as speaker level connections.

LFE Home Theater Input
Dynamo 400 and 600X’s right inputs double as an LFE input for home theater applications. Dynamo 800X ups the ante by adding a discrete LFE RCA line level input. Dynamo 1100X and 1600X go one step further by adding both XLR and RCA inputs for LFE connection.

MartinLogan Dynamo 400 subwoofer rear panel highlighting connections


  • Frequency Response: 30–200 Hz ±3 dB | Anechoic in LFE mode
  • Impedance
    • RCA: 8300Ω
    • Speaker Level: 2000Ω (red to black)
  • Low Frequency Transducer: 8” high-excursion, inverted surround, polypropylene cone in stamped steel basket with extended throw driver assembly | Ported
  • Amplifier: 75 Watts (150 peak)
  • Controls (Backplate)
    • Level: Min–Max
    • Low-Pass Filter: 35–120Hz, Bypass
    • Phase: 0°, 180°
    • Power Mode: On, Auto
  • Inputs (Audio)
    • Line Level: Left, Right/LFE
    • Speaker Level: Left and Right via banana jacks
  • Power Draw: Typical: 20W | Max: 90W | Idle: 4W | Standby: 0.5W
  • Feet: Rubber
  • Weight: 28.5 lbs
  • Dimensions: 15.2" x 13.3" x 13.7"
  • Finish: Satin Black
  • MartinLogan 3-Year Warranty

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