Bose 901 V Manual

The Bose 901 V is a fifth-generation direct/reflecting speaker system renowned for its unique acoustic design, utilizing nine full-range drivers per speaker (eight facing rearward, one forward) with an active electronic equalizer to achieve a lifelike, spacious soundstage. Below are key sections covering features, setup, operation, specifications, and maintenance.

Features at a Glance

Key components: Two 901 V speaker cabinets, Active Equalizer unit, Grilles, Spikes/feet, Owner's manual.

Feature	Description
Direct/Reflecting Design	9 drivers (8 rear, 1 front) for spacious, enveloping sound
Active Equalizer	Required for frequency response correction and system balance
Full-Range Drivers	Nine 4.5-inch drivers per speaker
Acoustic Matrix Enclosure	Sealed, non-ported design for accurate bass
Placement Flexibility	Works best 18-24 inches from wall, angled slightly inward
Equalizer Bypass	Switch for comparing equalized/unequalized sound
Input/Output	Tape monitor loop connection
Level Controls	Separate level controls for each channel on equalizer
Power Handling	Up to 450 watts peak per system
Finish Options	Walnut, Black Ash, White

System Components

Unpack and verify all items are present and undamaged.

1. Two Bose 901 V Speaker Cabinets
2. Active Equalizer Unit with power cord
3. Two removable grilles
4. Four spikes or rubber feet (for each speaker)
5. Owner's Manual and warranty card

WARNING! Speakers are heavy; lift with care using handles or with assistance.

Installation & Placement

Proper placement is critical for optimal performance.

1. Position speakers: Place each speaker 18-24 inches from rear wall, 6-10 feet apart.
2. Angle speakers: Aim speakers slightly inward toward listening position.
3. Attach feet/spikes: Install provided spikes (hard floors) or rubber feet (carpet).
4. Install equalizer: Place near amplifier/receiver in a well-ventilated area.
5. Connect equalizer: Use tape monitor loop on your receiver/amplifier.

CAUTION! Do not place speakers in corners or too close to side walls. Ensure equalizer is powered on for proper sound.

Specifications

• Type: Direct/Reflecting loudspeaker system.
• Drivers: Nine 4.5-inch full-range drivers per enclosure.
• Frequency Response: 35Hz - 16kHz (±3dB with equalizer).
• Impedance: 8 ohms nominal.
• Power Handling: 10-450 watts per channel (peak).
• Sensitivity: 90dB SPL at 1 meter with 1 watt input.
• Dimensions (each): 24.5" H x 14.5" W x 12.5" D.
• Weight: Approximately 48 lbs (21.8 kg) each.
• Equalizer Power: 120V AC, 60Hz.
• Warranty: Limited 5-year warranty on speakers, 3-year on electronics.

Equalizer Setup & Controls

The active equalizer is essential for proper frequency response.

Front Panel: POWER switch, LEVEL controls (Left/Right), BYPASS switch.

Rear Panel: AC input, INPUT from receiver tape out, OUTPUT to receiver tape in, SPEAKER outputs to amplifiers.

Setup Steps:

1. Connect equalizer to receiver's tape monitor loop.
2. Connect equalizer speaker outputs to amplifier inputs (if using separate amp).
3. Power on equalizer before receiver.
4. Set receiver to TAPE MONITOR or AUX (depending on connection).
5. Adjust LEVEL controls to match volume between channels.
6. Use BYPASS to compare equalized (engaged) vs. unequalized sound.

Connecting to Your System

Connection via tape monitor loop is standard.

1. Turn off all components before connecting.
2. Connect receiver TAPE OUT to equalizer INPUT.
3. Connect equalizer OUTPUT to receiver TAPE IN.
4. If using separate amplifier: Connect equalizer speaker outputs to amplifier inputs.
5. Connect speakers to amplifier outputs (not to equalizer).
6. Plug equalizer into AC outlet.

Tip: Ensure all connections are secure. Use high-quality interconnects and speaker wire.

Operation & Listening Tips

For best performance, follow these guidelines.

1. Power sequence: Turn on equalizer first, then amplifier/receiver.
2. Volume: Start at low volume and increase gradually.
3. Bypass switch: Use to audition the effect of the equalizer.
4. Room adjustments: Small changes in placement can significantly affect sound.
5. Break-in: Allow 50-100 hours of play at moderate volume for optimal performance.
6. Source material: Use high-quality recordings to appreciate full capabilities.

WARNING! Do not exceed amplifier's power rating. Distortion can damage speakers.

Care & Maintenance

Unplug equalizer before cleaning. Use dry, soft cloth for speakers; avoid liquids.

Grille removal: Pull gently from bottom corners to remove for cleaning.

Driver care: Do not touch driver cones. Use compressed air for dust removal if needed.

CAUTION! Do not use chemical cleaners or abrasives on cabinets. Keep away from moisture and heat sources.

Warranty & Support

Bose Corporation provides a limited 5-year warranty on speakers and 3-year warranty on the active equalizer. Proof of purchase required. This product is protected by patents worldwide. For support, visit www.bose.com or contact Bose Customer Service at 1-800-999-2673.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound from speakers	Equalizer off/connections	Ensure equalizer is powered on; check tape monitor loop connections; verify receiver is set to TAPE/AUX.
Distorted sound	Overdriven amplifier	Reduce volume on amplifier; check equalizer LEVEL controls are not set too high.
Uneven channel balance	Level settings/placement	Adjust LEVEL controls on equalizer; verify symmetrical speaker placement.
Lack of bass or treble	Equalizer bypassed	Ensure BYPASS switch is off (equalizer engaged).
Hum or noise	Ground loop/poor connections	Check all connections are secure; try different AC outlet; ensure cables are away from power cords.
One speaker not working	Wire connection	Check speaker wire connections at both amplifier and speaker; swap channels to isolate issue.

Reset: Power cycle equalizer and amplifier. Recheck all connections.

Service: Do not attempt to repair speakers or equalizer. Contact Bose authorized service.