Alpine SPS-M601W 6.5 Inch Marine Coaxial Speakers 30w RMS
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The Alpine SPS-M601W is a 6.5" (16.5cm) 2-way marine coaxial speaker with 30W RMS power handling, a PEI balanced dome tweeter and saltwater corrosion-resistant construction, built for use inside the boat or in the cockpit.
Key specifications
- Size: 6.5" (165.1mm) woofer
- Power handling: 30W RMS / 100W peak
- Impedance: 4 ohms
- Frequency response: 50Hz – 20kHz
- Sensitivity: 89dB (1W/1m)
- Mounting depth: 72.1mm
- Tweeter: Titanium/PEI balanced dome, neodymium magnet
- Construction: Poly-mica cone, high-temp ABS frame, UV-resistant grille
Alpine SPS-M601W 16.5cm 2-Way Marine Coaxial Speaker
Alpine's Marine speaker range draws on over 30 years of car audio experience. The SPS-M601W is designed to work efficiently with Alpine Marine head units, delivering strong audio performance alongside the durability demanded by the marine environment.
Built strong for long durability
Constructed using the latest marine-rated materials, these speakers are engineered to perform optimally in an infinite baffle configuration — no enclosure required.
Marine-ready
The SPS-M601W carries ASTM Salt/Fog and UV Marine certification and NEMA Level 5 water resistance, making it well equipped to handle the harshest marine conditions.
Perfect amp-speaker matching
All Alpine Marine speakers are engineered to work with the PDX Marine Amplifier range, ensuring both power handling and audio characteristics are properly matched for the best possible sound quality.
Designed for clean installation with maximum water resistance
A hidden-screw grille design and a supplied waterproof rubber mounting gasket keep installation clean and leak-free. All parts — including the speaker connections — are saltwater corrosion resistant. Magnetic shielding prevents interference from other marine electronics, so the SPS-M601W can be installed anywhere on the boat.
Tweeters in special marine design
The SPS-M601W's PEI balanced tweeter is designed for maximum high-frequency projection in the open marine environment. Built-in protection keeps output stable at higher volumes, and the tweeter is fully saltwater corrosion resistant.
High-strength frames
All models use high-strength polypropylene frames that resist UV and corrosion, keep the motor structure correctly aligned for maximum output, and handle the higher vibration levels found on the water.
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Specification
| Sensitivity | 89dB / W(1m) |
|---|---|
| Impedance | 4 Ω |
| Frequency Response | 50Hz - 20khz |
| Woofer Mounting Depth | 2-27/32'' |
| Woofer Mounting Depth | 72.1mm |
| Woofer Mounting Diameter | 5'' |
| Woofer Mounting Diameter | 127mm |
| Woofer Diameter | 6-1/2'' |
| Woofer Diameter | 165.1mm |
| Power Handling | Capacity (Peak) 100 Watts |
| Power Handling | Capacity (RMS) 30 Watts |
| Crossover Type | Built-in Tweeter Protection |
| Frame | High Temp ABS Frame |
| Cone | Material Poly-Mica Woofer Cone |
| Grill Cover Type | Ultra UV (Centrix® 813) Resistant Grill |
| Magnet | Material Neodymium Magnet |
| Application Type / Design Detail | Internal / Fixed Tweeter |
| Tweeter Type | Titanium/PEI Balanced Dome Tweeter |
| CEA-2031 Power Rating | 30 Watts |
What's Included
- SPS-M601W
Alpine
About the Alpine SPS-M601W
From our tech experts at CEN
Marine-rated speakers, built to cope with damp, salt and UV where ordinary car speakers would not last.
Who it suits
Boats and open vehicles, and increasingly camper awning areas where speakers are exposed to the weather.
Our tech experts advise
Mounting location and power source matter more in a marine install than in a car, and corrosion protection on the wiring is essential. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs and what the work involves. See car audio installation.
Explore the full Alpine range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Alpine
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Frequently Asked Questions
Q: Is the Alpine SPS-M601W waterproof?
A: It is built for marine use with NEMA level 5 water resistance, salt/fog and UV marine specification, and saltwater corrosion-resistant parts including the speaker connections. A waterproof rubber mounting gasket is supplied.
Q: Does the SPS-M601W need an enclosure?
A: No. It is engineered to work in an infinite baffle configuration, so it does not need an enclosure.
Q: What mounting depth does the SPS-M601W need?
A: The woofer mounting depth is 72.1mm (2-27/32").
Q: Can I mount it near other marine electronics?
A: Yes. It has magnetic shielding to avoid interference with other marine electronic devices, so it can be installed anywhere on the boat.
