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BOSS AUDIO MR4.3B Marine 4" 3-way 200-watt Enclosed System Speakers

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Old price : $63.00

Boss Audio Systems, Inc. Part#: MR4.3B 799916920228 - BOSS AUDIO MR4.3B Marine 4" 3-way 200-watt Enclosed System Speakers

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Midrange – Poly Injection

Polyurethane, categorized as a polymer, is a resilient, flexible, and durable manufactured material that can take the place of paint, cotton, rubber, metal, or wood in thousands of applications across virtually all fields. It can be hard like fiberglass, squishy like upholstery foam, protective like varnish, bouncy like rubber, or sticky like glue. In the specific case of our cones, this material allows for maximum flexibility that produces great sounding speakers lasting you a long, long time.

Surround – Rubber

Rubber is a synthetic (man made) material and is valued for its chemical inertness, impermeability to air, and the ability to endure or resist exposure to the many types of weather fronts. Rubber has applications from sports equipment to automotive parts, the medical industry and more. We use them for the surrounds that connect the cone to the basket. Did you know that most modern chewing gum uses food-grade rubber as the central gum base, which contributes not only the gum's elasticity but an obstinate, sticky quality? Just like that chewing gum, the rubber surround in our speakers can take the equivalent amount of abuse without quitting on you.

Voice Coil – Aluminum

One of the most abundant elements on earth, aluminum is remarkable for its low density and for its ability to resist corrosion. It is nonmagnetic (does not have any magnetic properties) and does not easily ignite. This solid material has the ability to perform under stress in both high tension and high compression environments.Aluminum is relatively soft, making it one of the more ideal materials to use in voice coils.

Tweeter – Piezo

Piezoelectric tweeters have several advantages over conventional tweeters. They are resistant to overloads that would normally destroy most high frequency drivers and they can be used without a crossover due to their electrical properties. The active element is basically a piece of polarized material (i.e. some parts of the molecule are positively charged, while other parts of the molecule are negatively charged).


  • 4 inch three-way indoor/outdoor box speaker
  • Woofer: 4 inches
  • Tweeter: .79 inches
  • Peak power: 100 Watts
  • RMS power: 50
  • Nominal impedance: 4 to 6 Ohms
  • Frequency response: 100Hz – 20kHz
  • Sensitivity: 85 dB 2.83v @ 1 Meter
  • Dimensions: 31.14 H x 2.09 W x 2.09 L
  • Weight: 2.8 pounds


  • Weather Proof Enclosed System 4" 3-way Speaker Pair
  • 200 Watts MAX 100 Watts RMS Power Handling per Pair
  • 80 Hz to 18 kHz Frequency Response and 85dB Sensitivity
  • Polypropylene Woofer Cone with Rubber Surround
  • 1 Tweeter and 1.5 inch Poly Cone Midrange Per Speaker
  • 3 Year Platinum Dealer Warranty

Catalog Numbers:

  • QZ4890
  • MR4.3B


  • 799916920228
  • 163121093846
  • 791489118996
  • 780126746258
  • 872182734925
  • 014445817420
  • 088022257428
  • 617407342864
  • 115970802889
  • 791489120289
  • 168141270192
  • 115970968110
  • 070071263994
  • 163121446628
  • 803982861962
  • 168141401985
  • 801200962699
  • 132017919164
  • 680808420653
  • 014444716083


  • 0780126746258
  • Manufacturer: Boss Audio Systems, Inc.
  • Part Number: MR4.3B
  • Model: MR4.3B
  • Color: Black