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Martin Audio CSX212B Subwoofer (CSX212B-F) with a maximum SPL capability of 138dB peak at 1 meter

800-watt, passive with dual 12" units, water resistant cones, compact

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  • Martin Audio's CSX212
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With twin high-efficiency 12" (300mm)/3" (75mm) voice coil long-throw bass drivers and optimally-sized reflex ports to minimize air noise, Martin Audio's CSX212 is the perfect sub-bass where low frequency extension and impact is required from a very compact, unobtrusive, low-profile enclosure.

The CSX212 is designed to be used with CDD Series full range systems from the CDD5 to the CDD12 and extends the low frequency operating range of the combined system down to 40Hz. The enclosure is constructed from high-density MDF and is internally-braced to reduce energy transmission to the enclosure panels and baffle. Its perforated steel grille is procurved to withstand damage and it can be supplied fitted with optional flying points.


  • Compact, direct-radiator subwoofer
  • 2 x 12" (300mm) drivers with 3" (75mm) voice coils
  • Water resistant cones
  • Compact, low-profile styling
  • Large ports for reduced air noise
  • Perforated steel grille
  • Black or white standard color options
  • Integrated flying points

Specifications for the Martin Audio CSX212B Subwoofer

{ "Type" : "Compact, dual-driver direct radiating subwoofer", "Frequency Response" : "48 Hz - 150 Hz ±3 dB, -10 dB @ 35 Hz", "Drivers" : "Dual 12" (300 mm)/3" (75 mm) voice coils, long excursion, ferrite magnet, waterproof cone", "Rated Power" : "800 W AES, 3200 W peak", "Recommended Amplifier" : "MA5.2K", "Sensitivity" : "106 dB", "Maximum SPL" : "132 dB continuous, 138 dB peak (half space)", "Nominal Impedance" : "4 Ohms", "Dispersion (-6 dB)" : "Omnidirectional", "Crossover" : "80 Hz - 120 Hz active", "Enclosure" : "100 liter, high-density MDF", "Finish" : "Black textured paint", "Protective Grille" : "Black perforated steel", "Connectors" : "Low-profile 20 A push-lock", "Pin Connections" : "Left to right = Input +, Input -, Link -, Link +", "Dimensions" : "34.3" W x 15.2" H x 17.2" D (872 x 385 x 437 mm)", "Weight" : "86 lbs (39 kg) " }

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