Bose AM 141 Manual

The Bose AM 141 is a high-performance, multi-purpose speaker system designed for commercial and professional applications. It features a 4.5-inch full-range driver, weather-resistant construction, 70V/100V transformer with multiple power taps, and a wide dispersion pattern. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: 4.5-inch full-range driver, weather-resistant enclosure, multi-tap transformer, mounting bracket, and protective grille.

Feature	Description
Driver Size	4.5-inch full-range
Power Handling	15W continuous, 30W program
Transformer Taps	70V: 15W, 7.5W, 3.75W, 1.875W / 100V: 15W, 7.5W
Frequency Response	90Hz - 16kHz (±3dB)
Dispersion	120° conical
Sensitivity	89dB SPL (1W/1m)
Impedance	8 ohms (direct) / 70V/100V (transformer)
Enclosure	ABS plastic, weather-resistant
Mounting	Integrated bracket for wall/ceiling
Connections	Spring-loaded terminals

Installation

Unpack and inspect contents. Choose appropriate mounting location.

1. Select mounting surface: Ensure wall or ceiling can support speaker weight (2.2 lbs).
2. Mount bracket: Use provided screws to secure bracket to surface.
3. Attach speaker: Slide speaker onto bracket and tighten locking screw.
4. Wire connections: Connect audio cables to spring-loaded terminals.
5. Set transformer taps: Select appropriate power setting for your system.

WARNING! Ensure mounting surface is secure. Disconnect power before wiring.

First-Time Setup

Configure speaker for your audio system requirements.

1. Determine system voltage: Check if your system uses 70V, 100V, or direct 8-ohm output.
2. Set transformer taps: Use small screwdriver to select appropriate power tap.
3. Connect to amplifier: Ensure amplifier output matches speaker configuration.
4. Test audio: Play test tone or music to verify proper operation.
5. Adjust positioning: Aim speaker for optimal coverage area.

CAUTION! Do not exceed recommended power settings. Match impedance correctly.

Specifications

• Driver: 4.5-inch full-range
• Power Handling: 15W continuous, 30W program
• Frequency Response: 90Hz - 16kHz (±3dB)
• Sensitivity: 89dB SPL (1W/1m)
• Impedance: 8 ohms direct; 70V/100V transformer
• Transformer Taps: 70V: 15W, 7.5W, 3.75W, 1.875W; 100V: 15W, 7.5W
• Dispersion: 120° conical
• Enclosure: ABS plastic, weather-resistant
• Dimensions: 7.3" x 5.8" x 5.4" (185mm x 147mm x 137mm)
• Weight: 2.2 lbs (1.0 kg)
• Operating Temp: -40°C to 70°C (-40°F to 158°F)

Controls and Settings

Primary configuration through transformer tap settings and physical positioning.

Transformer Taps: Located on back panel. Use small screwdriver to select: - 70V system: Choose 15W, 7.5W, 3.75W, or 1.875W based on required volume and system capacity - 100V system: Choose 15W or 7.5W - Direct 8-ohm: Set to "8Ω" position for traditional amplifier connection

Mounting Adjustments: Bracket allows 15° tilt adjustment for optimal aiming.

Wire Connections: Spring-loaded terminals accept 12-18 AWG wire.

Connecting Devices

Connect to various audio system types.

1. 70V/100V Systems: Connect to constant voltage amplifier output.
2. Direct 8-ohm: Connect to standard amplifier speaker outputs.
3. Multiple Speakers: Connect in parallel for 70V/100V systems.
4. Wire Gauge: Use 12-18 AWG for best performance.
5. Polarity: Maintain consistent polarity throughout system.

Tip: Label wires and tap settings for easy system management.

System Configuration

Optimize for different applications.

1. Background Music: Lower tap settings (3.75W or 1.875W) for even coverage.
2. Paging/Voice: Medium tap settings (7.5W) for clear speech intelligibility.
3. Music Emphasis: Higher tap settings (15W) for fuller frequency response.
4. Outdoor Use: Ensure weather-resistant connections; use appropriate conduit.
5. Multiple Zones: Calculate total wattage to not exceed amplifier capacity.

WARNING! Do not mix 70V and 100V speakers on same amplifier channel.

Safety Features

Weather-resistant construction: IP44 rating for protection against water splashes. Thermal protection: Built-in protection against overheating. Secure mounting: Locking bracket prevents accidental dislodging.

Care & Maintenance

Regular inspection ensures optimal performance.

1. Cleaning: Wipe exterior with damp cloth; avoid harsh chemicals.
2. Grille: Remove dust with soft brush or low-pressure air.
3. Connections: Check terminals for corrosion or loose wires quarterly.
4. Mounting: Verify bracket security annually.
5. Weatherproofing: Inspect seals if used outdoors.

CAUTION! Do not spray water directly into speaker. Disconnect power before maintenance.

Regulatory Information

FCC Part 15: Class B digital device compliance. CE marked for European compliance. RoHS compliant. UL listed. Copyright © Bose Corporation. All rights reserved. Bose and the Bose logo are registered trademarks of Bose Corporation. For technical support, visit www.bose.com or contact Bose Professional support at 1-877-230-2339.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Incorrect tap setting / Loose connection	Check tap setting; verify wire connections; test amplifier output.
Distorted audio	Overdriven / Incorrect impedance	Reduce amplifier volume; check tap setting matches system voltage.
Intermittent sound	Loose wires / Corrosion	Secure all connections; clean terminals if corroded.
Hum or buzz	Ground loop / Poor connections	Check system grounding; ensure clean connections.
Low volume	Incorrect tap setting / Amplifier issue	Increase tap setting; verify amplifier output level.
Weather damage	Water ingress	Check seals; ensure proper outdoor installation.

Reset: Verify all tap settings and connections.

Service: 1-877-230-2339; www.bose.com/professional