Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your BLAUPUNKT GTX691 6" x 9" 4-Way Coaxial Car Speakers. The GTX691 speaker pair is engineered to deliver clear and powerful audio performance in your vehicle, featuring a durable polypropylene cone, rubber edge, robust ferrite magnet structure, 1" aluminum voice coil, and a Mylar dome tweeter. Please read this manual thoroughly before installation and use to ensure proper function and longevity of your speakers.
Package Contents
Verify that all items are present and in good condition upon opening the package.
- (2) BLAUPUNKT GTX691 6" x 9" 4-Way Coaxial Car Speakers
- (2) Speaker Grilles (typically included for protection)
- Note: Mounting hardware and speaker wire are typically supplied by the installer or purchased separately.

Image: BLAUPUNKT GTX691 Car Speaker with protective grille installed.
Safety Information
Observe the following safety precautions during installation and operation:
- Always disconnect the vehicle's battery before beginning any electrical installation to prevent short circuits and electrical shock.
- Ensure proper wiring and connections. Incorrect wiring can damage the speakers, amplifier, or vehicle's electrical system.
- Consult a professional car audio installer if you are unsure about any part of the installation process.
- Avoid installing speakers in locations where they may be exposed to water or excessive moisture. The speakers are not waterproof.
- Do not operate the speakers at excessively high volumes for prolonged periods, as this can cause hearing damage and speaker damage.
- Ensure speakers are securely mounted to prevent them from becoming loose during vehicle movement, which could cause injury.
Setup and Installation
Proper installation is crucial for optimal performance and safety. Refer to your vehicle's service manual for specific panel removal and wiring diagrams.
Tools and Materials (Not Included)
- Wire strippers/crimpers
- Screwdriver set
- Drill (if new mounting holes are required)
- Speaker wire (16-18 gauge recommended)
- Electrical tape or heat shrink tubing
- Mounting screws and clips (if not using existing hardware)
Installation Steps
- Disconnect Battery: Before starting, disconnect the negative terminal of your vehicle's battery.
- Access Mounting Location: Carefully remove the vehicle's interior panels to access the speaker mounting locations.
- Remove Old Speakers: Disconnect the wiring from the existing speakers and remove them from their mounting points.
- Check Fitment: Test fit the BLAUPUNKT GTX691 speakers in the opening. The speaker dimensions are approximately 15.35"L x 10.63"W x 4.61"H. Ensure there is sufficient mounting depth and clearance for the magnet structure. Note: Some vehicles may require adapter plates or modifications for proper fitment.
- Wiring: Connect the new speaker wires to the terminals on the BLAUPUNKT GTX691 speakers. Ensure correct polarity (positive to positive, negative to negative). The speakers have an impedance of 4 Ohms.
- Mount Speakers: Securely mount the speakers using appropriate screws and clips. Ensure they are firmly seated and do not rattle.
- Connect to Vehicle Wiring: Connect the speaker wires to the vehicle's existing speaker wiring or directly to your amplifier/head unit, maintaining correct polarity.
- Reassemble Panels: Carefully reassemble the vehicle's interior panels.
- Reconnect Battery: Reconnect the negative terminal of the vehicle's battery.

Image: BLAUPUNKT GTX691 Car Speaker showing the cone and tweeter assembly without the grille.
Key Speaker Components

Image: Close-up view highlighting the Mylar Dome Tweeter and Polypropylene Cone.
The BLAUPUNKT GTX691 features a Mylar Dome Tweeter designed for clear high-frequency reproduction. Mylar is a durable material that resists tearing and offers consistent sound quality across various frequency changes. The main speaker cone is constructed from Polypropylene with a rubber edge, providing flexibility and durability for enhanced audio performance, especially at higher volumes.

Image: Detailed view of the speaker's internal components, focusing on the Aluminum Voice Coil.
An Aluminum Voice Coil is integrated into the speaker design to enhance performance and efficiency, particularly under high-temperature conditions and during demanding audio playback. This construction helps maintain sound quality and speaker longevity.
Operating Instructions
Once installed, the BLAUPUNKT GTX691 speakers operate as part of your vehicle's audio system.
- Power On: Turn on your car's audio head unit.
- Initial Volume: Start with the volume at a low level and gradually increase it to a comfortable listening level.
- Audio Settings: Adjust the bass, treble, balance, and fader settings on your head unit to optimize sound quality for your vehicle's acoustics and personal preference.
- Break-in Period: New speakers often benefit from a "break-in" period. During the first few hours of use, operate the speakers at moderate volumes to allow the cone and suspension to loosen and achieve optimal performance.
- Avoid Overdriving: Do not turn the volume up to a point where the sound becomes distorted or harsh, as this can damage the speakers.
Maintenance
The BLAUPUNKT GTX691 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.
- Avoid Moisture: Keep the speakers dry. If they become wet, allow them to air dry completely before use.
- Temperature: Avoid exposing the speakers to extreme temperatures for extended periods, as this can affect material integrity.
- Inspection: Periodically check mounting screws for tightness and wiring connections for security.
Troubleshooting
If you experience issues with your BLAUPUNKT GTX691 speakers, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speakers |
|
|
| Distorted or unclear sound |
|
|
| One speaker not working |
|
|
Specifications
Detailed technical specifications for the BLAUPUNKT GTX691 Car Speakers:
| Model Name | BLAUPUNKT GTX691 Car Speaker 6" x 9" 4-Way Coaxial Speaker Pair 700Watts |
| Speaker Type | Coaxial, 4-Way |
| Speaker Size | 6 x 9 Inches |
| Maximum Output Power | 700 Watts |
| Impedance | 4 Ohms |
| Sensitivity | 90 dB |
| Cone Material | Polypropylene (PP) with Rubber Edge |
| Tweeter Type | Mylar Dome Tweeter |
| Voice Coil | 1" Aluminum Voice Coil |
| Magnet Structure | Ferrite Magnet |
| Basket Material | High Quality Steel |
| Product Dimensions (LxWxH) | 15.35 x 10.63 x 4.61 inches |
| Item Weight | 7.2 Pounds |
| Connectivity Technology | Wired |
| Is Waterproof | No |
| UPC | 815592026907 |
Warranty and Support
The BLAUPUNKT GTX691 Car Speakers come with a limited warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official BLAUPUNKT website.
For technical support, troubleshooting assistance beyond this manual, or warranty claims, please contact BLAUPUNKT customer service through their official website or the contact information provided with your purchase.
Online Support: www.blaupunkt.com





