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Kicker 45KM42 4" 2-Ohm Marine Coaxial Speaker Pair

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  • Locking/Sealed Terminal Covers
  • Charcoal and White Grilles Included
  • Meets or Exceeds ASTM Standards for UV* and Salt/Fog Exposure

Kicker 45KM42 4" 2-Ohm Marine Coaxial Speaker Pair

Hear them loud and clear, the KM Coaxial Marine Speakers are built to pump out the tunes – and the fun - for years to come! Whether you mount your speakers in the hull, or KICKER® tower enclosures, you also get a pair of stout marine-grade grilles!

Marine Marvels

Our speakers are made to thrive in the water. UV treatments on injection-molded cones, Santoprene® surrounds, baskets and grilles all help maintain top-shelf performance. KM speakers will endure almost any weather conditions with splash-and-spray-resistant sealed motors and locking/sealed terminal covers. Speaker hardware is forged from rustproof, 316L stainless-steel.

Two-Ohm Voice Coil
1/2-Inch PEI Tweeter
Locking/Sealed Terminal Covers
UV-Treated Polypropylene Woofer With Santoprene® Surround
UV-Resistant Polymer Basket
316L Stainless Mounting Hardware Included
Charcoal and White Grilles Included
Meets or Exceeds ASTM Standards for UV* and Salt/Fog Exposure**

*ASTM G154 400 hr. Accelerated UV Test

**ASTM B117 200 hr. Salt Fog Test

This KM Four-Inch Coaxial Speaker works best with 50 watts of recommended power.


Woofer(in,mm): 4, 100
Tweeter(in,mm): 1/2, 13
Tweeter Dome Material: PEI
Rated Impedance(Ω): 2
Peak Power (watts, per ANSI/CTA-2031-A): 150
Recommended Amplifier Power (watts RMS): 50
Sensitivity(1W,1m): 89
Frequency Response(Hz): 60-20k

Mounting Hole Diameter(in,mm): 3-3/4, 94
Mounting Template*
*For template to be accurate, ensure the print properties are set at 100% not scale to page.

Mounting Depth(in,mm): 1-13/16, 46
LED Lighting: No
Grilles: Charcoal and White

What's in the Box

2 - 4" 2Ω Coaxials
8 - Mounting Screws
8 - Mounting Screw Clips
2 - Wire Connection Cover
2 - Zip Ties


Return Policy

30 Day No Hassle Returns

Installation Guarantee

Lifetime guarantee on installation


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More Information
Product Name Kicker 45KM42 4" 2-Ohm Marine Coaxial Speaker Pair
SKU 45KM42
Manufacturer Kicker
Manufacturer Sku 45KM42
Manufacturer's Warranty 1 Year Manufacture's Warranty
UPC 713034085072
Speaker Size 4"
Design Coaxial
Tweeter Composition PEI
Woofer Composition UV-Treated Polypropylene
Woofer Surround Santoprene®
Sensitivity 89dB
Frequency Response 60 HZ - 20 kHZ
RMS Power Handling (watts) 26-50
Peak Power Handling (watts) 126-150
Impedance (Ohms) 2 Ohm
Crossover Internal
Cutout Diameter (in) 3 3/4"
Top-mount Depth (Inches) 1 13/16"
Water Resistant Yes