1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Alpine SXE-1751S 6.5-inch 2-Way Component Speaker System. Please read this manual thoroughly before attempting installation or use to ensure optimal performance and safety.
The Alpine SXE-1751S is designed to deliver high-quality audio reproduction in a vehicle environment, featuring a separate woofer and tweeter for enhanced sound staging and clarity.
2. Safety Information
- Electrical Safety: Always disconnect the vehicle's battery negative terminal before beginning any electrical work to prevent short circuits and electrical shock.
- Professional Installation: If you are unsure about any aspect of the installation, it is recommended to seek assistance from a qualified professional installer.
- Wiring: Ensure all wiring is properly insulated and secured to prevent damage from vibration or contact with sharp edges. Use appropriate gauge wire for connections.
- Volume Levels: Prolonged exposure to high volume levels can cause hearing damage. Adjust the volume to a comfortable level.
- Mounting: Securely mount all components to prevent them from becoming loose during vehicle operation, which could cause injury or damage.
3. What's in the Box
Your Alpine SXE-1751S Component Speaker System package includes the following standard components:
- Two 6.5-inch Woofers
- Two Tweeters
- Mounting Hardware (screws, clips, etc.)
- Speaker Grilles (if applicable)

Image: The Alpine SXE-1751S component speaker system, showing two 6.5-inch woofers and two separate tweeters with their wiring.
4. Setup and Installation
Proper installation is crucial for optimal sound performance. Consider professional installation if you are unfamiliar with car audio wiring and vehicle disassembly.
4.1. Planning the Installation
- Location: Determine suitable mounting locations for the woofers and tweeters in your vehicle. Woofers are typically installed in door panels or kick panels, while tweeters are often mounted higher, such as on the dashboard or A-pillars, for better sound imaging.
- Clearance: Ensure there is sufficient mounting depth and clearance behind the speaker locations for the woofer magnets and tweeter bodies.
- Wiring Path: Plan the routing of speaker wires from your amplifier/head unit to the speaker locations, avoiding sharp edges and moving parts.
4.2. Woofer Installation
- Disconnect the vehicle's battery negative terminal.
- Carefully remove the existing speakers or prepare the mounting location. This may involve removing door panels or other interior trim.
- Mount the 6.5-inch woofer securely using the provided screws. Ensure a tight fit to prevent vibrations.
- Connect the speaker wires to the woofer terminals, observing correct polarity (+ to + and - to -).

Image: A single Alpine SXE-1751S 6.5-inch woofer, showing the speaker cone and mounting frame.
4.3. Tweeter Installation
- Choose a suitable mounting method for the tweeters (flush mount, surface mount, or angle mount) based on your vehicle's interior and desired sound direction.
- Secure the tweeter in its chosen location using the appropriate mounting hardware.
- Connect the tweeter wires, ensuring correct polarity. The SXE-1751S tweeters include an integrated crossover network, so no external crossover box is required.

Image: A single Alpine SXE-1751S tweeter, a small black circular unit with a mesh grille and blue and black wires extending from it.
4.4. Wiring Connections
Connect the positive (+) terminal of each speaker to the positive (+) output of your amplifier or head unit, and the negative (-) terminal to the negative (-) output. Incorrect polarity can lead to poor sound quality and reduced bass response.
After all speakers are connected, reassemble any removed vehicle trim and reconnect the vehicle's battery negative terminal.
5. Operating the Speaker System
Once installed, your Alpine SXE-1751S speakers will operate as part of your vehicle's audio system. Follow these general guidelines:
- Initial Playback: Start with the volume low and gradually increase it to a comfortable listening level.
- Audio Settings: Adjust the bass, treble, and balance settings on your head unit or amplifier to achieve your preferred sound. The separate tweeters allow for improved sound staging; experiment with your head unit's fader and balance controls.
- Break-in Period: Speakers often benefit from a 'break-in' period of several hours of normal use to achieve their full sonic potential.
6. Maintenance
The Alpine SXE-1751S speakers require minimal maintenance to ensure long-lasting performance.
- Cleaning: Use a soft, dry cloth to gently wipe dust from the speaker grilles and cones. Avoid using harsh chemicals or abrasive cleaners.
- Inspection: Periodically check speaker connections for tightness and ensure no wires are frayed or exposed.
- Environmental Factors: While designed for automotive use, avoid exposing speakers to excessive moisture or extreme temperatures.
7. Troubleshooting
If you experience issues with your speaker system, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speakers | Loose or incorrect wiring; amplifier/head unit issue; speaker damage | Check all wiring connections for tightness and correct polarity. Verify amplifier/head unit is powered on and functioning. Test with another known-good speaker if possible. |
| Distorted or unclear sound | Incorrect audio settings; speaker overload; damaged speaker; poor wiring connection | Adjust bass/treble settings. Reduce volume to prevent clipping. Check wiring for loose connections or shorts. Inspect speaker cones for physical damage. |
| Weak or no bass | Incorrect speaker polarity; phase issues; insufficient power | Verify speaker wire polarity. Ensure speakers are in phase. Check amplifier output and settings. |
| Intermittent sound | Loose wiring; faulty connection; amplifier issue | Inspect all wiring for intermittent contact. Ensure connections are secure. |
8. Specifications
Key technical specifications for the Alpine SXE-1751S Component Speaker System:
| Feature | Specification |
|---|---|
| Model Name | SXE-1751S |
| Speaker Type | 2-Way Component System (Woofer, Tweeter) |
| Woofer Diameter | 6.5 Inches (16.5 cm) |
| RMS Power | 45 Watts |
| Peak Power | 280 Watts |
| Nominal Impedance | 4 Ohms |
| Frequency Response | 60Hz - 20kHz |
| Woofer Material | Ferrite Woofer |
| Tweeter Material | Neodymium Tweeter |
| Voice Coil | Kapton Voice Coil |
| Product Dimensions | 3"D x 3"W x 8.75"H (Approximate, for packaging) |
| Item Weight | 2.99 pounds |
| UPC | 793276242976 |
9. Warranty Information
Alpine products are manufactured to high-quality standards and are warranted against defects in materials and workmanship. The specific warranty period and terms may vary by region and retailer. Please retain your proof of purchase for warranty claims.
For detailed warranty information, please refer to the warranty card included with your product or visit the official Alpine website.
10. Support
For further assistance, technical support, or inquiries regarding your Alpine SXE-1751S Component Speaker System, please visit the official Alpine website or contact their customer service department.
Alpine Official Website: www.alpine-usa.com
You can also visit the Alpine Store on Amazon for product information and support resources: Alpine Store





