🛒 Product Conditions
🔥 Closeout / Clearance: Final markdowns to clear out inventory — once it’s gone, it won’t be restocked.
🔄 Used: Pre-owned items, fully functional, with minor wear. Sold “as is” with no warranties.
📦 Open Box: Like-new, opened only for display or photography. Inspected, discounted, and ready to ship.
🔧 B-Stock: Factory refurbished or tested units that may show small imperfections or lack original packaging.
⚠️ Final Sale — No returns or exchanges on these items.
Description
KM4 Marine Coaxial 4 Ohm
SUPERIOR SOUND
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. These speakers can endure almost any weather conditions with splash-and-spray-resistant sealed motors, cones and Locking/Sealed Terminal Covers. Speaker hardware is forged from rustproof, 316L stainless-steel.
- IP66 certification (protected from dust and water jets/splash)
- Four-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.
Specifications
| Woofer(in,mm) |
| 4, 100 |
| Tweeter(in,mm) |
| 1/2, 13 |
| Tweeter Dome Material |
| PEI |
| Rated Impedance(Ω) |
| 4 |
| 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" 4Ω Coaxials 8 - Mounting Screws 8 - Mounting Screw Clips 2 - Wire Connection Cover 2 - Zip Ties |
💬 Contact SMS Car Audio
Get quick answers on condition, fitment, or availability.
📞 Call (504) 289-8127 💬 Text (504) 289-8127 ✉️ Email al@smscaraudio.com 📍 Get Directions