1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Alpine SPE-6090 6x9-inch 2-Way Car Audio Speakers. Please read this manual thoroughly before installation and use to ensure optimal performance and longevity of your speakers. Retain this manual for future reference.
2. Product Overview
The Alpine SPE-6090 speakers are designed to deliver clear and dynamic audio in your vehicle. These are 6x9-inch, 2-way coaxial speakers, suitable for a wide range of car audio systems.
2.1 Key Features
- 6x9-inch 2-way coaxial speaker design.
- Peak power handling: 600 watts per pair (300 watts each).
- RMS power handling: 150 watts per pair (75 watts each).
- Frequency response: 65Hz - 18,000Hz.
- Sensitivity: 91dB.
- Includes protective grilles.
2.2 What's in the Box
- Two (2) Alpine SPE-6090 2-way speakers.
- Two (2) Speaker Grilles.
- Two (2) Bottom mount brackets.
- Two (2) 14.75-foot lengths of speaker wire.
- Eight (8) 1-3/8 inch screws.
- Warranty information.
- Online product registration information.

Image 1: Front view of the Alpine SPE-6090 speakers, showing one speaker with its grille installed and another without, revealing the cone.
3. Setup and Installation
Proper installation is crucial for optimal sound quality and speaker longevity. If you are unsure about any steps, it is recommended to consult a professional car audio installer.
3.1 Safety Precautions
- Disconnect the vehicle's negative battery terminal before starting any electrical work to prevent short circuits.
- Wear appropriate safety gear, including eye protection.
- Ensure all wiring is properly insulated and secured to prevent damage and interference.
- Verify speaker polarity before making final connections.
3.2 Tools and Materials Required (Not Included)
- Screwdriver set (Phillips and flathead)
- Wire strippers/crimpers
- Drill (if new mounting holes are required)
- Electrical tape or heat shrink tubing
- Panel removal tools (to avoid damaging vehicle interior)
3.3 Installation Steps
- Access Speaker Location: Carefully remove the vehicle's interior panels to access the factory speaker locations. Refer to your vehicle's service manual for specific instructions.
- Remove Old Speakers: Disconnect the wiring from the existing speakers and unmount them.
- Test Fit New Speakers: Place the Alpine SPE-6090 speakers into the opening. Use the included bottom mount brackets if necessary to ensure a secure fit. The cutout dimensions are 5-15/16" x 8-3/4".
- Mount Speakers: Secure the speakers using the provided 1-3/8 inch screws. Ensure they are firmly seated and do not vibrate.
- Wire Connections: Connect the provided speaker wires to the terminals on the Alpine speakers. Ensure correct polarity (positive to positive, negative to negative). The included speaker wire lengths are 14.75 feet.
- Connect to Head Unit/Amplifier: Route the speaker wires to your head unit or external amplifier. Connect them according to the wiring diagram of your audio system.
- Test System: Before reassembling the interior panels, reconnect the vehicle's battery and test the speakers to ensure they are functioning correctly and producing clear sound.
- Reassemble: Once confirmed, carefully reassemble all interior panels.

Image 2: Close-up front view of a single Alpine SPE-6090 speaker with its protective grille installed.

Image 3: Diagram showing the dimensions of the Alpine SPE-6090 speaker, indicating 6 inches by 6 inches by 3 inches.
4. Operating Instructions
The Alpine SPE-6090 speakers are passive components and do not require specific operational controls beyond proper connection to an audio source (head unit or amplifier).
- Power On: Turn on your car's audio system (head unit or amplifier).
- Adjust Volume: Gradually increase the volume to a comfortable listening level. Avoid excessively high volumes that cause distortion, as this can damage the speakers.
- Audio Settings: Use your head unit's or amplifier's equalizer and balance/fader controls to fine-tune the sound to your preference.
Important: Ensure the power output of your amplifier or head unit does not exceed the RMS power handling of the speakers (75 watts per speaker) to prevent damage.
5. Maintenance
The Alpine SPE-6090 speakers require minimal maintenance to ensure long-lasting performance.
- Cleaning: Gently wipe the speaker grilles and surrounds with a soft, dry cloth to remove dust. Avoid using harsh chemicals or abrasive cleaners.
- Inspection: Periodically check speaker connections to ensure they are secure. Inspect the speaker cones and surrounds for any signs of damage.
- Environmental Factors: Protect speakers from excessive moisture, direct sunlight, and extreme temperatures, which can degrade materials over time.
6. Troubleshooting
If you encounter issues with your speakers, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speakers |
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| Distorted or unclear sound |
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| Intermittent sound |
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7. Specifications
| Model Name | SPE-6090 |
| Speaker Type | Coaxial, 2-Way |
| Speaker Size | 6x9 Inches |
| Peak Power Handling | 600 Watts (per pair) / 300 Watts (each) |
| RMS Power Handling | 150 Watts (per pair) / 75 Watts (each) |
| Frequency Response | 65Hz - 18,000Hz |
| Sensitivity | 91dB |
| Impedance | 4 Ohms |
| Cutout Dimensions | 5-15/16" x 8-3/4" |
| Product Dimensions (approx.) | 6"D x 6"W x 3"H |
| Included Components | Speakers, Grilles, Bottom mount brackets, Speaker wire, Screws |
| Manufacturer | Alpine |
| ASIN | B0038NUFXS |
| UPC | 613815575801, 793276601506 |
8. Warranty and Support
Alpine products are manufactured to high-quality standards. Your Alpine SPE-6090 speakers come with a standard manufacturer's warranty.
For detailed warranty terms and conditions, please refer to the warranty information included in your product packaging or visit the official Alpine website. For technical support, product registration, or service inquiries, please contact Alpine customer service through their official channels.
Online Product Registration: Information for online product registration is included in the box. Registering your product can assist with warranty claims and support.
Alpine Official Website: www.alpine-usa.com





