ONKYO D-057M Multi-Channel Speaker System Instruction Manual

1. Introduction

Thank you for purchasing the ONKYO D-057M Multi-Channel Speaker System. This manual provides essential information for the proper setup, operation, and maintenance of your speaker. Please read it thoroughly before use and retain it for future reference.

Key Features:

• A-OMF Woofer Diaphragm: Features a newly developed A-OMF (ONKYO Micro Fiber) woofer diaphragm, engineered for high rigidity and light weight. This design minimizes inherent material vibrations, ensuring precise and dynamic sound reproduction. It utilizes a 3-layer structure combining PEN (Polyethylene Naphthalate) fibers with natural woven and non-woven fibers, achieving excellent responsiveness and smooth frequency characteristics.
• Neo Balance Dome Tweeter: Equipped with a Neo Balance Dome Tweeter capable of reproducing ultra-high frequencies up to 100kHz. This ensures compatibility with wide-range next-generation audio formats like DVD Audio and Super Audio CD, offering a long-life specification adaptable to future media.
• Slit Duct Bass Reflex System: Incorporates a unique 'Slit Duct' bass reflex port, designed with an optimized aspect ratio to significantly improve bass reproduction. This design reduces coloration from standing waves and minimizes sluggishness in low frequencies, delivering bass with both volume and speed.
• All-MDF Cabinet with Real Wood Veneer: The cabinet is constructed entirely from MDF (Medium Density Fiberboard), chosen for its natural and beautiful resonance with minimal specific frequency resonance compared to particle board. Strategic placement of sound-absorbing and diffusing materials inside controls internal standing waves. The exterior features a real wood veneer finish, achieved through a meticulous process of painting and polishing, ensuring both superior sound quality and a luxurious aesthetic.

2. Safety Information

Please observe the following safety precautions to prevent damage to the speaker or injury to yourself and others:

• Placement: Place the speaker on a stable, level surface to prevent it from falling. Avoid locations exposed to direct sunlight, high temperatures, high humidity, or excessive vibrations.
• Ventilation: Ensure adequate ventilation around the speaker. Do not block ventilation openings.
• Moisture: Do not expose the speaker to rain or moisture. Do not place objects filled with liquids, such as vases, on the speaker.
• Foreign Objects: Do not insert any objects into the speaker openings. This could cause electric shock or damage.
• Cleaning: Disconnect the speaker from the amplifier before cleaning. Use a soft, dry cloth. Do not use liquid cleaners or aerosol cleaners.
• Servicing: Do not attempt to service the speaker yourself. Refer all servicing to qualified service personnel.

3. Package Contents

Verify that all items are present in the package:

• ONKYO D-057M Multi-Channel Speaker Unit (1)
• Instruction Manual (this document)
• Speaker Cables (not included, sold separately)

4. Setup

4.1 Speaker Placement

Proper speaker placement is crucial for optimal sound quality. Consider the following:

• Stereo Setup: For a stereo setup, place the left and right speakers equidistant from your listening position, forming an equilateral triangle.
• Height: Position the speakers so that the tweeters are approximately at ear level when you are seated in your primary listening position.
• Distance from Walls: Avoid placing speakers directly against walls or in corners, as this can overemphasize bass frequencies. Experiment with distances to find the best balance.
• Stability: Ensure the speakers are placed on stable surfaces or stands to prevent vibrations and improve sound clarity.

Figure 1: Front view of the ONKYO D-057M Multi-Channel Speaker System. This image shows the compact design and wood grain finish of the speaker unit.

4.2 Connections

Before making any connections, ensure that your amplifier/receiver and the speaker are turned off.

1. Speaker Cables: Use high-quality speaker cables. Strip approximately 10-15mm (0.4-0.6 inches) of insulation from the ends of the speaker wires. Twist the bare wires tightly to prevent stray strands.
2. Connect to Speaker: Connect the positive (+) terminal (red) on the speaker to the positive (+) terminal on your amplifier/receiver. Connect the negative (-) terminal (black) on the speaker to the negative (-) terminal on your amplifier/receiver. Ensure a secure connection.
3. Polarity: Maintain correct polarity (positive to positive, negative to negative) for all speakers in your system. Incorrect polarity can result in poor sound quality, especially in the bass range.

5. Operating

Once the speaker is properly connected to your amplifier/receiver, you can begin playback.

1. Power On: Turn on your amplifier/receiver and select the appropriate input source.
2. Volume Control: Start with the volume at a low level and gradually increase it to a comfortable listening level. Avoid excessively high volumes, which can damage the speakers or your hearing.
3. Break-in Period: New speakers often benefit from a 'break-in' period. Play music at moderate volumes for several hours to allow the drivers to loosen up and achieve their optimal performance.
4. Sound Adjustments: Use the tone controls (bass/treble) on your amplifier/receiver sparingly. For the most accurate sound, it is generally recommended to keep these controls flat or bypassed.

6. Maintenance

Regular maintenance helps preserve the appearance and performance of your speaker.

• Cleaning the Cabinet: Wipe the cabinet with a soft, dry cloth. For stubborn dirt, slightly dampen the cloth with water and then wipe dry immediately. Do not use abrasive cleaners, waxes, or solvents, as these can damage the wood veneer finish.
• Grille: The speaker grille can be carefully removed for cleaning if necessary. Use a soft brush or a vacuum cleaner with a brush attachment to remove dust.
• Avoid Touching Drivers: Do not touch the woofer or tweeter diaphragms, as this can cause damage.

7. Troubleshooting

If you experience issues with your speaker, refer to the following common problems and solutions:

If the problem persists after trying these solutions, please contact your ONKYO dealer or authorized service center.

8. Specifications

Technical specifications for the ONKYO D-057M Multi-Channel Speaker System:

• Product Model Number: D-057M(D)
• Speaker Type: Bookshelf, 2-way
• Number of Units: 2
• Enclosure Type: Bass Reflex
• Magnetic Shielding: Magnetically Shielded
• Frequency Response (Low): 70Hz
• Frequency Response (High): 100,000Hz
• Crossover Frequency: 7,000Hz
• Impedance: 6 Ohms
• Wireless: Not supported
• Color: Wood Grain
• Waterproof: No
• Discontinued by Manufacturer: No

9. Warranty and Support

ONKYO products are manufactured to the highest quality standards. For information regarding your product's warranty, please refer to the warranty card included with your purchase or visit the official ONKYO website for details specific to your region.

For technical support, service, or inquiries about replacement parts, please contact your local ONKYO dealer or an authorized ONKYO service center. Contact information can typically be found on the ONKYO official website or in your product documentation.