Definitive Technology Dymension DM30 Center Channel Speaker User Manual

1. Introduction

The Definitive Technology Dymension DM30 is a flagship center channel speaker designed to enhance home theater audio systems. It features a 5-driver array, including midrange woofers and a tweeter, along with an integrated powered subwoofer and passive radiators. This manual provides essential information for setting up, operating, and maintaining your DM30 speaker to ensure optimal performance.

Image: Definitive Technology Dymension DM30 Center Channel Speaker, front view.

2. Product Features

• 5-Driver Array: Features four 5.25" Balanced Double Surround System (BDSS) midrange woofers and a 1" aluminum oxide tweeter for clear vocals and detailed sound.
• Integrated 8" Powered Subwoofer: Provides full-range performance with significant bass impact.
• 3XR Architecture: Combines the integrated subwoofer with two passive radiators for enhanced bass response.
• Patented Intelligent Bass Control: Blends subwoofer output seamlessly with midrange and high frequencies.
• Patented Linear Response Waveguide: Extends off-axis dispersion for a wider soundstage and immersive audio.
• Discrete Design: Wrapped in an acoustically transparent black cloth grille, allowing the speaker to blend into your room environment.
• Timbre-Matched: Designed to integrate seamlessly with other Definitive Technology Dymension, Dymension CI, and Mythos series speakers for a cohesive surround sound system.

Image: Internal view showing the 5-driver array of the DM30 speaker.

Image: Internal view highlighting the integrated 8-inch powered subwoofer.

Image: Internal view illustrating the dual passive radiators for enhanced bass.

Image: Close-up of the custom aluminum oxide tweeter for crisp highs.

Image: The DM30 center channel speaker shown alongside other timbre-matched Definitive Technology speakers.

3. What's in the Box

Upon unpacking your Definitive Technology Dymension DM30 speaker, please ensure all items are present:

• DM30 Center Channel Speaker
• Literature Pack (User Manual, Warranty Information)
• Power Cable

4. Setup

4.1 Placement

The DM30 center channel speaker is designed for optimal performance when placed on a stable surface directly below or above your television or projection screen. Ensure the speaker is centered horizontally with your display for the best soundstage and dialogue clarity. Avoid placing objects directly in front of the speaker grille that could obstruct sound. Maintain adequate ventilation around the speaker.

4.2 Connections

1. Speaker Wire Connection: Connect your receiver's center channel output to the speaker's binding posts using high-quality speaker wire. Ensure correct polarity (+ to + and - to -) for optimal sound.
2. Power Connection: Connect the provided power cable to the DM30's power input and then to a wall outlet. The integrated powered subwoofer requires AC power.
3. Subwoofer LFE Input (Optional): If your receiver has a dedicated LFE output for the center channel's subwoofer, you can connect it using an RCA cable. Refer to your receiver's manual for specific settings.

4.3 Initial Configuration

After connecting, perform an initial setup through your AV receiver. This typically involves:

• Setting the center channel speaker size to "Small" or "Large" based on your system's capabilities and preferences.
• Adjusting crossover frequencies. A common starting point for the DM30 is around 80-120 Hz, but this can be fine-tuned.
• Using your receiver's auto-calibration feature (e.g., Audyssey, MCACC, YPAO) for automatic level and distance adjustments.
• Adjusting the Intelligent Bass Control knob on the speaker's rear panel to blend the subwoofer output with the main drivers. Start at the midpoint and adjust to taste.

5. Operating Instructions

Once properly set up, the DM30 operates in conjunction with your AV receiver. Ensure your receiver is powered on and the correct input source is selected. The speaker will automatically receive audio signals from the receiver.

• Volume Control: Adjust the overall system volume using your AV receiver's remote control.
• Intelligent Bass Control: The dedicated knob on the rear of the DM30 allows for fine-tuning the integrated subwoofer's output level. Adjust this to achieve your desired bass balance with the rest of your system.
• Power Indicator: The DM30 may have a subtle power indicator light. Refer to the detailed literature pack for its specific behavior.

6. Maintenance

To ensure the longevity and optimal performance of your DM30 speaker, follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to gently wipe the speaker cabinet. For the grille, use a soft brush or vacuum with a brush attachment to remove dust. Avoid using harsh chemicals or abrasive cleaners.
• Placement: Keep the speaker away from direct sunlight, heat sources, and excessive moisture.
• Ventilation: Ensure proper airflow around the speaker, especially the rear panel where the amplifier for the subwoofer is located.
• Connections: Periodically check all cable connections to ensure they are secure and free from corrosion.

7. Troubleshooting

If you encounter issues with your DM30 speaker, consult the following common troubleshooting steps:

• No Sound:
  • Check all speaker wire connections at both the speaker and the receiver.
  • Ensure the power cable is securely connected and the speaker is receiving power.
  • Verify the correct input source is selected on your AV receiver.
  • Confirm the center channel is enabled and not muted in your receiver's settings.
• Distorted Sound:
  • Reduce the volume level on your receiver.
  • Check speaker wire for frayed strands or short circuits.
  • Ensure the Intelligent Bass Control knob is not set too high, causing over-excursion.
• Weak Bass:
  • Increase the Intelligent Bass Control level on the speaker.
  • Check the subwoofer level and crossover settings in your AV receiver.
  • Ensure the power cable for the integrated subwoofer is connected.
• Dialogue Unclear:
  • Verify the speaker is centered with your display.
  • Check the center channel level in your receiver's settings and adjust if necessary.
  • Ensure no objects are blocking the speaker's drivers.

If problems persist, consult the full literature pack or contact Definitive Technology customer support.

8. Specifications

9. Warranty and Support

9.1 Warranty Information

The Definitive Technology Dymension DM30 speaker comes with the following warranty:

• Electronics: 3 years
• Cabinet & Driver: 5 years

Please retain your proof of purchase for warranty claims. For detailed terms and conditions, refer to the warranty information included in your literature pack.

9.2 Customer Support

For technical assistance, troubleshooting beyond this manual, or warranty service, please contact Definitive Technology customer support. You can typically find contact information on the official Definitive Technology website or within the product's literature pack.