Klipsch RB-81 II Bookshelf Speaker User Manual

1. Introduction

This manual provides comprehensive instructions for the safe and effective setup, operation, and maintenance of your Klipsch RB-81 II Bookshelf Speaker. Please read this manual thoroughly before using your speaker and retain it for future reference.

The Klipsch RB-81 II is a high-performance passive bookshelf speaker designed to deliver clear and dynamic audio. It features an 8-inch woofer and a horn-loaded tweeter for detailed sound reproduction.

2. Safety Instructions

Observe the following safety precautions to prevent damage to the speaker or injury to yourself:

• Placement: Ensure the speaker is placed on a stable, level surface to prevent it from falling. Avoid placing it near heat sources, direct sunlight, or in areas with high humidity.
• Ventilation: Do not block any ventilation openings. Adequate airflow is necessary to prevent overheating.
• Power: This is a passive speaker and requires an external amplifier. Ensure the amplifier is turned off before connecting or disconnecting speaker wires.
• Connections: Use appropriate gauge speaker wire and ensure correct polarity (+ to + and - to -) when connecting to an amplifier. Incorrect wiring can damage the speaker or amplifier.
• Cleaning: Disconnect the speaker from the amplifier before cleaning. Use a soft, dry cloth. Do not use liquid cleaners or aerosols.
• Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
• Volume Levels: Prolonged exposure to high volume levels can cause permanent hearing damage. Use caution when adjusting volume.

3. Package Contents

Your Klipsch RB-81 II Bookshelf Speaker package should contain the following items:

• Klipsch RB-81 II Bookshelf Speaker (1 unit)
• User Manual (this document)
• Grille (if applicable, typically pre-attached or included)

Note: Speaker wire and amplifier are sold separately and are required for operation.

4. Setup

4.1 Speaker Placement

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

• Stereo Imaging: For a stereo setup, place the speakers equidistant from your primary listening position and spaced apart to form an equilateral triangle.
• Height: Position the speakers so that the tweeters are approximately at ear level when you are seated in your listening position.
• Distance from Walls: The RB-81 II features a front-firing port, which allows for more flexible placement closer to walls compared to rear-ported designs. However, some distance from the rear and side walls can improve bass response and soundstage. Experiment with placement to find the best balance for your room.
• Stability: Ensure the speakers are placed on a stable surface, such as sturdy speaker stands or a robust bookshelf, to prevent vibrations and ensure clear sound.

Figure 1: Front view of the Klipsch RB-81 II Bookshelf Speaker. This image shows the speaker's black cabinet, the prominent copper-colored 8-inch woofer, and the horn-loaded tweeter above it. A front-firing port is visible below the woofer, and the Klipsch logo is at the bottom.

Figure 2: Side view of the Klipsch RB-81 II Bookshelf Speaker with key dimensions. The height is approximately 48.51 cm, depth 31.24 cm, and width 23.62 cm. These dimensions are important for planning placement.

4.2 Connecting to an Amplifier

The Klipsch RB-81 II is a passive speaker and requires an external amplifier or receiver. Follow these steps for connection:

1. Turn off all equipment: Ensure your amplifier/receiver and the speakers are powered off before making any connections.
2. Prepare speaker wire: Strip approximately 1/2 inch (1.2 cm) of insulation from the ends of your speaker wires. Twist the bare strands tightly.
3. Connect to speakers: The RB-81 II features bi-wire/bi-amp capable binding posts. For standard single-wire connection, ensure the metal jumpers connecting the high-frequency (HF) and low-frequency (LF) terminals are in place. Connect the positive (+) terminal (red) on the speaker to the positive (+) terminal on your amplifier. Connect the negative (-) terminal (black) on the speaker to the negative (-) terminal on your amplifier.
4. Connect to amplifier: Repeat the process for the other speaker, ensuring consistent polarity.
5. Bi-wiring/Bi-amping (Advanced): If you intend to bi-wire or bi-amp, remove the metal jumpers. Connect separate speaker wires from your amplifier to the HF terminals and LF terminals on the speaker. Consult your amplifier's manual for bi-amping instructions.
6. Verify connections: Double-check all connections to ensure they are secure and that positive terminals are connected to positive, and negative to negative.

5. Operation

Once your Klipsch RB-81 II speakers are properly connected to an amplifier, you can begin playback:

1. Power On: Turn on your amplifier/receiver.
2. Source Selection: Select the desired audio source on your amplifier (e.g., CD player, streaming device, turntable).
3. Volume Adjustment: Start with the volume at a low level and gradually increase it to your desired listening level.
4. Listening: Enjoy your audio.

Note: The specifications mention "Bluetooth" and "Remote" control. These features are typically associated with active speakers or integrated systems. The Klipsch RB-81 II is a passive speaker, meaning it relies on your amplifier for these functionalities. Please refer to your amplifier's manual for details on Bluetooth connectivity or remote control operations.

6. Maintenance

To ensure the longevity and optimal performance of your Klipsch RB-81 II speakers, follow these maintenance tips:

• Cleaning: Regularly wipe the speaker cabinet with a soft, dry, lint-free cloth. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the finish.
• Grilles: The speaker grilles can be carefully removed for cleaning. Use a soft brush or a vacuum cleaner with a brush attachment to remove dust.
• Avoid Moisture: Keep the speakers away from liquids and excessive humidity.
• Environmental Conditions: Store and operate the speakers in a stable room temperature environment, away from extreme heat or cold.

7. Troubleshooting

If you encounter issues with your Klipsch RB-81 II speakers, refer to the following common troubleshooting steps:

• No Sound:
  • Ensure the amplifier is powered on and the correct input source is selected.
  • Check all speaker wire connections at both the speaker and amplifier ends for proper seating and polarity.
  • Verify that the amplifier's volume is not set to minimum or muted.
  • Test with another audio source or another pair of speakers (if available) to isolate the problem.
• Distorted Sound:
  • Reduce the volume level on your amplifier.
  • Check speaker wire connections for any loose strands that might be shorting.
  • Ensure the amplifier is not overdriven (playing too loud for its power rating).
  • Inspect speaker cones for any visible damage.
• Uneven Sound (One Speaker Louder/Quieter):
  • Check the balance settings on your amplifier.
  • Verify speaker wire connections for both speakers are identical and secure.
  • Ensure speakers are placed symmetrically in the room.

If the problem persists after trying these steps, consult a qualified audio technician.

8. Specifications

The following table details the technical specifications for the Klipsch RB-81 II Bookshelf Speaker:

9. Warranty and Support

Klipsch products are manufactured to high-quality standards and are warranted against defects in materials and workmanship. Specific warranty terms and conditions may vary by region and retailer. Please retain your proof of purchase for warranty claims.

For technical support, service, or warranty inquiries, please contact your authorized Klipsch dealer or visit the official Klipsch website for contact information in your region.

This manual is for informational purposes only. Klipsch reserves the right to change specifications without notice.