Blaupunkt MSx 402

4" 2-way marine speakers

  • Blaupunkt MSx 402


  • Blaupunkt MSx 402


  • Blaupunkt MSx 402

  • Blaupunkt MSx 402

  • Blaupunkt MSx 402

  • Blaupunkt MSx 402

  • Blaupunkt MSx 402


Our take on the Blaupunkt MSx 402

by Jon Paulette

Rockin' sound at a reasonable price

Blaupunkt Marine BPMSX402 4" 2-way coaxial speakers

The big 1" tweeter broadcasts the high frequencies effectively.

Blaupunkt's MSx 402 4" marine speakers will boost your boat's sound without taking too big a bite out of your budget. These full-range speakers feature injected polypropylene (IPP) woofer cones for lively midrange and low-frequency response, while the 1" tweeters make the high frequencies come alive. These low-profile speakers require less than 2" of mounting depth, so you can install them in a wide variety of boats.   

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Durability and performance

These speakers are all about durability and performance. They're specially designed to withstand the salt, spray, and sunlight that can turn lesser speakers into ballast after just one season on the water. Covered magnets, insulated cable terminals, and stainless steel hardware ensure long-lasting quality. The stylish, protective grilles will blend almost anywhere.


  • 4" 2-way marine speakers (pair)
  • injected polypropylene woofer with rubber surround
  • 1" tweeter with neodymium magnet
  • white ABS basket
  • power range: 2-30 watts RMS (140 watts peak power)
  • frequency response: 90-22,000 Hz
  • sensitivity: 90 dB
  • top-mount depth: 1-7/8"
  • grilles included
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Design 2-way
Tweeter Design 1" Dome
Tweeter Composition not given
Woofer Composition Polypropylene
Woofer Surround Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity 90 dB
Frequency Response 90 - 22k Hz
RMS Power Range (Watts) 2-30
Peak Power Handling (Watts) 140
Impedance (Ohms) 4
Top-mount Depth (Inches) 1 7/8
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 3 3/4
Product Research
What's in the box?

Download owner's manual

  • 2 Marine speakers
  • 2 White grilles
  • Two 11' Lengths of speaker wire (quick slides on one end and bare wire on the other)
  • Eight 1-1/8" Stainless steel mounting screws
  • 8 Stainless steel speed clips
  • Cut-out template
  • Installation manual (English and 12 other languages)

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.


Marine Certifications:

  • UV Exposure: ASTM D4329-2005
  • Salt Spray/Fog: ASTM-B117
  • Water Spray: DIN/IEC 68, part 2-18 Fc Rb 3
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Blaupunkt MSx 402 Reviews

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4 out of 5

Good little speakers for my sailboat.

Written By Alan, Hampton, VA on Tuesday, October 14, 2014
Crutchfield Customer Review (What's this?)
I used these to replace some very old Radio Shack speakers in the cockpit of my 26' sailboat without cutting bigger holes. For their size and price they sound pretty good. They're not really loud enough to listen to with the outboard running but while under sail they work very well. At the dock they are loud enough to listen to while relaxing in the cockpit or down below but not loud and bassy enough to disturb neighboring boats. They don't have much bass but that is to be expected due to their small size. Over all the sound is crisp and clear.
Affordable. Small. Good stainless mounting hardware provided.
Not much bass.
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For a more in-depth review and enhanced detailed information on the Blaupunkt MSx 402, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_023BPMS402/Blaupunkt-MSx-402.html ).