Poly-Planar MS56 Box Subwoofer


Mounting Style = Surface | Waterproof = Yes | Watts Max = 100 | Cutout Size = N/A | QTY = Single | Watts RMS = 50

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MS56 Box Subwoofer

The MS-56 subwoofer is a compact, high-efficiency bass enclosure optimized for marine applications.  Its small size enables it to be easily mounted below seats, under the gunwale area, behind the instrument panel, or in any convenient location. 

The MS-56 is a self-contained bass unit requiring no cutting of panels or holes in the boat interior. It produces solid, deep bass extending down to 40Hz and is the perfect addition to any audio system.


  • Dual Voicecoil, high-excursion, 5.25″ woofer
  • High density, UV stable enclosure
  • Water-resistant
  • Bass-reflex, high-efficiency acoustic design
  • Side vented output ports
  • Compact size and molded-in mounts provide for convenient installation nearly anywhere

Technical Specifications:

  • Max Power – 100W RMS
  • Frequency – 40 Hz – 300 Hz
  • Weight: 8.5 lb (3.8g)
  • Dimensions  (W x L x H) – 8-5/8″ x 11.5″ x 4-13/16″ (218 x 292 x 122mm)

*Sold as an Individual

Weight 8 lbs
Dimensions 14 × 11 × 7 in


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