1. Introduction
The Diamond Audio DMD652 DMD-Series is a 6.5-inch 2-way full-range coaxial speaker system designed for automotive audio applications. This speaker system integrates a woofer and a tweeter into a single unit, providing a comprehensive audio solution. Key features include a silk dome tweeter for natural sound reproduction and robust construction for reliable performance within a vehicle's audio environment.
2. Important Safety Instructions
- Always disconnect the vehicle's battery negative terminal before beginning any installation.
- Ensure all wiring is properly insulated to prevent short circuits.
- Mount speakers securely to prevent them from becoming projectiles in the event of a sudden stop or accident.
- Avoid installing speakers in locations that obstruct vehicle operation or safety features.
- Do not expose speakers to excessive moisture or extreme temperatures. This product is not waterproof.
- Consult a professional installer if you are unsure about any aspect of the installation process.
- Operating audio systems at excessively high volumes can cause permanent hearing damage.
3. Package Contents
Verify that all items are present in the package:
- Diamond Audio DMD652 6.5-inch Coaxial Speakers (2 units)
- Speaker Grilles (2 units)
- Mounting Hardware (screws, clips)
- Owner's Manual (this document)
4. Setup and Installation
Proper installation is crucial for optimal performance and longevity of your speakers. If you are not experienced with car audio installation, it is recommended to seek professional assistance.
4.1. Mounting
The DMD652 speakers are designed for standard 6.5-inch mounting locations in vehicles. Ensure the mounting depth of 2.26 inches (57.5mm) is sufficient in your chosen location.
Figure 1: Front view of the DMD652 speaker without grille.
Figure 2: Side view of the DMD652 speaker, showing mounting depth.
- Prepare the Mounting Location: Carefully remove the existing speakers or prepare the speaker cutouts. Ensure the surface is clean and free of obstructions.
- Test Fit: Place the speaker into the opening to confirm proper fitment.
- Secure the Speaker: Use the provided mounting screws to secure the speaker firmly into place. Do not overtighten.
- Install Grilles: If desired, attach the speaker grilles over the installed speakers.
Figure 3: Front view of the DMD652 speaker with grille installed.
4.2. Wiring
The DMD652 speakers are passive and require connection to an external amplifier or head unit. Observe proper polarity during wiring.
- Connect the positive (+) terminal of the speaker to the positive (+) output of your amplifier/head unit.
- Connect the negative (-) terminal of the speaker to the negative (-) output of your amplifier/head unit.
- Ensure all connections are secure and free from corrosion. Use appropriate gauge speaker wire for your application.
5. Operation
Once properly installed and connected to your vehicle's audio system, the DMD652 speakers will reproduce audio from your source unit.
5.1. Basic Use
Turn on your vehicle's head unit or amplifier. Begin with the volume at a low setting and gradually increase it to a comfortable listening level. The speakers are designed to handle up to 100 Watts RMS (Root Mean Square) power.
5.2. Audio Adjustments
Adjust bass, treble, and balance settings on your head unit or amplifier to achieve your preferred sound. Avoid excessive bass or treble boost at high volumes, as this can lead to distortion and potential speaker damage.
6. Maintenance
The Diamond Audio DMD652 speakers require minimal maintenance to ensure long-lasting performance.
- Cleaning: Use a soft, dry cloth to gently wipe dust from the speaker cones and grilles. Do not use harsh chemicals or abrasive cleaners.
- Inspection: Periodically check speaker connections for tightness and ensure no wires are frayed or exposed.
- Environment: While designed for automotive use, avoid prolonged exposure to direct sunlight or extreme temperatures when possible, as this can degrade materials over time.
7. Troubleshooting
If you experience issues with your DMD652 speakers, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speaker(s) | Loose or incorrect wiring; Amplifier/head unit off or faulty; Speaker damaged. | Check all wiring connections for proper polarity and tightness. Ensure amplifier/head unit is powered on and functioning. Test with another known-good speaker if possible. |
| Distorted sound | Volume too high; Amplifier clipping; Incorrect gain settings; Damaged speaker. | Reduce volume. Check amplifier gain settings. Ensure amplifier is not overdriven. Inspect speaker cone for physical damage. |
| Weak or unbalanced sound | Incorrect balance/fader settings; One speaker wired out of phase; Low power. | Adjust balance and fader controls on head unit. Verify correct wiring polarity for all speakers. Ensure amplifier is providing adequate power. |
| Buzzing or rattling noise | Loose mounting; Speaker grille vibrating; Internal speaker damage. | Tighten mounting screws. Check if grille is securely attached. Inspect speaker for physical damage. |
8. Specifications
Technical specifications for the Diamond Audio DMD652 Coaxial Speaker System:
- Model: DMD652
- Speaker Type: 2-Way Full-Range Coaxial
- Speaker Size: 6.5 Inches
- Woofer Diameter: 5.53 Inches
- Tweeter Diameter: 20 Millimeters
- Power Handling (RMS): 100 Watts
- Power Handling (Peak): 200 Watts
- Frequency Response: 69 Hz - 20,000 Hz
- Sensitivity: 87 dB
- Mounting Depth: 2.26 Inches (57.5mm)
- Audio Output Mode: Stereo
- Connectivity Technology: Coaxial (Wired)
- Compatible Audio Sources: Smartphone, Tablet, MP3 Player (via connected head unit/amplifier)
- Water Resistance Level: Not Water Resistant
- Manufacturer: Diamond Audio
- UPC: 847169034978
9. Warranty Information
The Diamond Audio DMD652 speaker system comes with a Limited Warranty. This warranty typically covers defects in materials and workmanship under normal use for a specified period from the date of purchase. Specific terms, conditions, and duration of the warranty may vary by region and retailer. Please retain your proof of purchase for warranty claims.
For complete warranty details, including coverage, exclusions, and the claims process, please refer to the official Diamond Audio website or contact your authorized dealer.
10. Customer Support
If you have questions, require technical assistance, or need to initiate a warranty claim, please contact Diamond Audio customer support or your authorized Diamond Audio dealer.
You can typically find contact information on the official Diamond Audio website: