Bogen AFI-8B Contractor Series Bi-Amped Loudspeaker Instruction Manual

1. Introduction

This manual provides essential information for the safe and effective installation, operation, and maintenance of your Bogen AFI-8B Contractor Series Bi-Amped Loudspeaker. Please read this manual thoroughly before using the product and retain it for future reference. The AFI-8B is a high-performance, two-way loudspeaker designed for professional audio applications, offering robust power handling and precise sound reproduction.

Figure 1: Front view of the Bogen AFI-8B Loudspeaker.

2. Safety Instructions

WARNING: To prevent fire or electric shock, do not expose this appliance to rain or moisture. Do not remove the cover. No user-serviceable parts inside. Refer servicing to qualified personnel.

• Read these instructions carefully before operation.
• Keep these instructions for future reference.
• Heed all warnings on the product and in the operating instructions.
• Follow all instructions.
• Do not use this apparatus near water.
• Clean only with a dry cloth.
• Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
• Only use attachments/accessories specified by the manufacturer.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
• Ensure proper rigging and mounting procedures are followed to prevent injury or damage. Consult a qualified professional for installation if unsure.

3. Product Overview

The Bogen AFI-8B loudspeaker is engineered for high-fidelity sound reproduction in demanding environments. Key features and components include:

• Driver Complement:
  • Low-Frequency: One Apogee 15" (381mm) neodymium magnet cone-type driver. This driver is treated with a waterproofing compound for moisture resistance and long-term stability of cone resonance and mass parameters. It also features Ferrofluid for enhanced power handling, reduced distortion, and controlled short-term impedance rise.
  • High-Frequency: One Apogee 3" (76mm) voice coil, 2" (51mm) exit horn-loaded compression driver. This driver is also treated with Ferrofluid for improved power handling, lower distortion, and stable impedance.
• Input Connectors: Barrier strip, screw type #8, for secure and reliable audio connections.
• Handles: Two integrated handles (one top, one bottom) designed as part of the enclosure for easy transport and positioning, ensuring no moving parts.
• Grille: Highly durable, quality finish on perforated steel, providing protection for the drivers.
• Rigging Hardware: Fourteen rigging points are provided for versatile installation. There are four points each on the top and bottom, and two each on both sides and the rear. All points are backed with 16-gauge steel and can accommodate 3/8"-16 or M10 thread types.
• Finish: Textured high-strength black epoxy paint for durability and a professional appearance.
• Enclosure Type: 30° trapezoidal, optimally-vented bass design for enhanced low-frequency performance.
• Cabinet Construction: Multi-ply hardwood for robust structural integrity.

4. Setup

4.1 Placement and Mounting

The AFI-8B loudspeaker features a 30° trapezoidal enclosure, allowing for array configurations. Its dispersion pattern is H: 60° x V: 40°. Consider this when determining placement to achieve optimal sound coverage.

For permanent installations, utilize the fourteen rigging points. Ensure that the mounting surface and hardware can safely support the loudspeaker's weight (77 lb). Use appropriate 3/8"-16 or M10 threaded hardware. Always consult with a qualified installer for complex rigging setups.

4.2 Electrical Connections

The AFI-8B is a bi-amped loudspeaker, meaning separate amplifier channels are required for the low-frequency and high-frequency drivers. Connect your amplifiers to the barrier strip, screw-type #8 input connectors on the loudspeaker.

• Ensure all power to amplifiers and other audio equipment is turned OFF before making connections.
• Use appropriate gauge speaker wire for the distance and power requirements.
• Observe correct polarity (+ and -) for all connections to prevent phase issues.
• Recommended Crossover: For full technical data on DSP-based processors and crossover settings, contact Apogee Sound. Proper crossover settings are crucial for optimal bi-amped performance and driver protection.

5. Operating Instructions

Once the loudspeaker is properly installed and connected, follow these guidelines for operation:

• Power On Sequence: Always power on your audio source and mixer first, then your amplifiers. When powering off, reverse this sequence: amplifiers off first, then mixer and source. This prevents transient pops that can damage speakers.
• Amplifier Matching: Ensure your amplifiers are appropriately matched to the loudspeaker's power handling capabilities. The AFI-8B has a maximum power handling of 400W continuous and 1600W peak. The nominal impedance for each driver is 8 ohms.
• Gain Staging: Set amplifier gains and mixer levels carefully to avoid clipping (distortion) which can damage the drivers. Monitor your audio signal for any signs of distortion.
• Monitoring Sound Levels: The loudspeaker has a maximum SPL of 125dB continuous and 131dB peak. Prolonged exposure to high sound pressure levels can cause hearing damage. Use hearing protection when operating at high volumes.
• Frequency Response: The loudspeaker provides a frequency response of 46Hz to 20kHz (±3dB), offering a wide range for various audio applications.

6. Maintenance

Regular maintenance helps ensure the longevity and optimal performance of your AFI-8B loudspeaker.

• Cleaning: Clean the cabinet and grille with a soft, dry cloth. Do not use abrasive cleaners, solvents, or excessive moisture, as these can damage the finish or internal components.
• Inspection: Periodically inspect all connections (speaker cables, rigging hardware) for signs of wear, corrosion, or looseness. Tighten any loose connections.
• Environment: Store and operate the loudspeaker in a stable environment, away from extreme temperatures, humidity, and direct sunlight.
• Professional Service: If you suspect any internal issues or damage, do not attempt to repair the unit yourself. Refer all servicing to qualified service personnel.

7. Troubleshooting

If you encounter issues with your AFI-8B loudspeaker, refer to the following common troubleshooting steps:

If these steps do not resolve the issue, contact qualified service personnel.

8. Specifications

9. Warranty and Support

For specific warranty information regarding your Bogen AFI-8B loudspeaker, please refer to the warranty card included with your product or contact the authorized Bogen dealer or distributor from whom you purchased the unit. Warranty terms and conditions may vary by region and seller.

For technical support, service, or inquiries about replacement parts, please contact your authorized Bogen service center or the manufacturer directly. Ensure you have your product model number (AFI-8B) and purchase details available when seeking support.