1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Alpine SPS-M601W 6.5-inch 2-Way Marine Coaxial Speakers. Designed for marine environments, these speakers offer high-quality audio performance and durability. Please read this manual thoroughly before installation and use to ensure proper function and longevity of your product.
2. Safety Information
Observe the following safety precautions to prevent damage to the product or injury to yourself.
- Water Exposure: While designed for marine use with IPX5 water resistance, avoid direct high-pressure water jets.
- Power Connections: Ensure all power connections are secure and correctly polarized to prevent electrical shorts or damage.
- Mounting: Mount speakers securely to prevent detachment during vessel movement.
- Volume Levels: Prolonged exposure to high volume levels can cause hearing damage.
- Professional Installation: If you are unsure about any installation steps, consult a qualified marine audio technician.
3. Setup and Installation
Proper installation is crucial for optimal performance and durability of your marine speakers. This section outlines the general steps for mounting and wiring.
3.1. Unpacking and Inspection
Carefully remove the speakers from their packaging. Inspect for any signs of damage during transit. Ensure all components are present:
- Alpine SPS-M601W 6.5-inch Marine Coaxial Speakers
- Mounting hardware (screws, clips)
- Grilles

Image 1: Four Alpine SPS-M601W speakers, illustrating the product's appearance with and without grilles.
3.2. Mounting Location Selection
Choose a mounting location that provides adequate space for the speaker's depth and allows for proper sound dispersion. Ensure the surface is flat and sturdy enough to support the speaker's weight. Consider areas protected from direct, continuous water submersion.

Image 2: Side profile of an Alpine SPS-M601W speaker, highlighting its mounting depth and grille design.
3.3. Cutting the Mounting Hole
- Refer to the specifications section for the precise cutout diameter.
- Use a template (often included or available from Alpine) to mark the cutting area.
- Carefully cut the hole using an appropriate tool, ensuring clean edges.
3.4. Wiring Connections
Connect the speaker wires to your marine audio amplifier or head unit. Observe correct polarity: positive (+) to positive and negative (-) to negative. Incorrect wiring can lead to phase issues and reduced sound quality.
- The speakers have a nominal impedance of 4 Ohms.
- Ensure your amplifier is stable at a 4 Ohm load.

Image 3: Rear view of the speaker, detailing the wiring terminals and internal components for connection.
3.5. Securing the Speakers
- Place the speaker into the mounting hole.
- Align the mounting holes on the speaker frame with the pre-drilled holes on the mounting surface.
- Secure the speaker using the provided screws. Do not overtighten.
- Attach the grilles by aligning them with the speaker frame and pressing firmly until they click into place or securing with screws if applicable.

Image 4: Two Alpine SPS-M601W speakers with grilles, demonstrating the finished appearance after installation.
4. Operation
Once installed, your Alpine SPS-M601W speakers are ready for use. They are designed to integrate seamlessly with your existing marine audio system.
- Power On: Turn on your marine head unit or amplifier.
- Audio Source: Select your desired audio source (radio, Bluetooth, auxiliary input, etc.).
- Volume Adjustment: Gradually increase the volume to a comfortable listening level. Avoid excessively high volumes to prevent distortion and potential speaker damage.
- Sound Settings: Adjust bass, treble, and balance settings on your head unit or amplifier to optimize sound quality according to your preference and the acoustic environment of your vessel.

Image 5: Detailed view of the speaker cone and tweeter, illustrating the 2-way coaxial design.
5. Maintenance and Care
Regular maintenance ensures the longevity and optimal performance of your marine speakers.
- Cleaning: Clean the speaker grilles and surrounds with a soft, damp cloth. Avoid abrasive cleaners or solvents.
- Saltwater Exposure: After exposure to saltwater, rinse the speakers with fresh water to prevent salt buildup, which can corrode components.
- UV Protection: The grilles are UV resistant (rated at ASTM D4329), but prolonged, extreme sun exposure can still affect appearance over time.
- Inspection: Periodically check wiring connections for corrosion or looseness. Ensure mounting screws remain tight.
6. Troubleshooting
If you experience issues with your Alpine SPS-M601W speakers, refer to the following common problems and solutions:
- No Sound:
- Check all wiring connections for proper polarity and secure contact.
- Verify the amplifier or head unit is powered on and functioning correctly.
- Ensure the audio source is active and volume is turned up.
- Distorted Sound:
- Reduce the volume level on your head unit or amplifier.
- Check for loose wiring connections.
- Ensure the amplifier is not overdriven or clipping.
- Verify the impedance of the speakers matches the amplifier's capabilities.
- Intermittent Sound:
- Inspect wiring for loose connections or corrosion.
- Check for any short circuits in the speaker wiring.
- One Speaker Not Working:
- Swap the non-working speaker with a known working one to determine if the issue is with the speaker or the wiring/amplifier channel.
- Check the balance settings on your head unit.
7. Specifications
Detailed technical specifications for the Alpine SPS-M601W 6.5-inch Marine Coaxial Speakers.
| Feature | Specification |
|---|---|
| Model Name | SPS M601W |
| Speaker Type | Woofer (Coaxial) |
| Speaker Size | 6.5 Inches |
| Surround Sound Channel Configuration | 2.0 |
| CTA-2031 Speaker Rating | 35W RMS, 110W Peak Power |
| Nominal Impedance | 4 Ohm |
| Frequency Response | 50Hz – 20kHz |
| Sensitivity | 89 dB |
| Water Resistance Rating | IPX5 |
| UV Resistance | ASTM D4329 (Grilles) |
| Salt Spray/Fog Resistance | ASTM B117 |
| Product Dimensions | 3 x 3 x 3 inches (approximate, for a single speaker) |
| Item Weight | 11.5 pounds (for the set of 4) |
| UPC | 613815879367 |

Image 6: Rear label of the speaker, displaying the model number SPS-M601W and manufacturing information.
8. Warranty and Support
For warranty information and technical support, please refer to the official Alpine website or contact Alpine customer service. Keep your purchase receipt as proof of purchase for warranty claims.
Visit the official Alpine Store for more products and support: Alpine Store on Amazon





