Skip to product information
1 of 1


Poly-Planar MA-840 80 Watt Subcompact Box Speaker - Black [MA840B]

Poly-Planar MA-840 80 Watt Subcompact Box Speaker - Black [MA840B]

Regular price $33.50 USD
Regular price $92.95 USD Sale price $33.50 USD
Sale Sold out
Tax included.

MA-840 80 Watt Subcompact Box Speaker - Black

These subcompact box speakers are designed to fit in difficult locations and still offer high-quality music sound. The ultra-low magnetic field design lets you mount them anywhere without adversely affecting navigation equipment such as compasses and autopilots. 

Polypropylene cones, stainless steel grills and brackets, and heavy-duty ABS enclosures make them corrosion-proof and waterproof. 


  • Ideal for locations where other speakers won't fit
  • Ultra-low magnetic field speaker
  • Stainless steel grill and bracket


  • Type - 2-way Coaxial
  • Cone Size - 3" (76.2mm)
  • Speaker Impedance- 4 ohms
  • Peak Power - 80 watts
  • Continuous Power - 40 watts 
  • Overall Dimensions - 4-3/16" x 4-1/16" x 4-1/2" (106mm x 102mm x114mm)

*Sold as a Pair

This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.


  • Mounting Style: Bracket
  • Size: 4" x 4.2"
  • QTY: Pair
  • LED Lighting: No
  • Watts Max: 80w
  • Watts RMS: 40w
  • Cutout Size: N/A
  • Box Dimensions: 5"H x 5"W x 9"L WT: 2.6 lbs
  • UPC: 731128084015

Quick Guide (pdf)
Brochure (pdf)
View full details