Jamo Sub 650 Manual

The Jamo Sub 650 is a high-performance powered subwoofer designed to deliver deep, powerful bass for home theater and audio systems. Featuring a 12-inch long-throw driver, 300-watt RMS amplifier, variable crossover, phase control, auto on/off functionality, and multiple input options. Below are key sections for setup, operation, features, specifications, and troubleshooting.

Features at a Glance

Key components: 12-inch bass driver, 300W RMS amplifier, front-firing design, magnetic shielding, auto power on/off.

Feature	Description
Driver Size	12-inch long-throw woofer
Amplifier Power	300W RMS (600W peak)
Crossover Frequency	40Hz - 180Hz continuously variable
Phase Control	0° - 180° adjustable
Inputs	Line-level RCA, LFE input
Auto On/Off	Automatic power management
Frequency Response	25Hz - 180Hz
Enclosure Type	Bass reflex with front port
Finish	Black wood grain vinyl
Power Requirements	110-120V AC, 60Hz

Installation & Placement

Choose optimal location for best bass performance.

1. Place subwoofer near main listening position for even bass distribution.
2. Keep at least 6 inches from walls for proper ventilation.
3. Avoid corners to prevent excessive bass buildup.
4. Ensure magnetic shielding for placement near CRT displays.

WARNING! Subwoofer is heavy; lift with proper technique. Ensure stable surface placement.

First-Time Setup

Connect and configure subwoofer for optimal performance.

1. Connect audio source: Use RCA cables from receiver subwoofer output.
2. Set volume: Start at 50% and adjust during calibration.
3. Set crossover: Match to main speakers' frequency response.
4. Set phase: Adjust for seamless integration with main speakers.
5. Power on: Connect to AC power and switch to auto mode.

CAUTION! Allow proper ventilation; do not block ports or vents.

Specifications

• Driver: 12-inch polypropylene cone
• Amplifier: 300W RMS Class D
• Frequency Response: 25Hz - 180Hz
• Crossover: 40Hz - 180Hz variable
• Inputs: Stereo line-in, LFE input
• Phase Control: 0° - 180° continuously variable
• Auto Power: Signal sensing on/off
• Dimensions: 16.5" W × 18.5" H × 20" D
• Weight: 45 lbs
• Power Consumption: 1W standby, 350W max

Controls and Connections

Rear panel controls: Volume, Crossover, Phase, Power switch, Inputs.

Connections: Line In (L/R RCA), LFE Input, AC Power.

Volume: Adjust output level (start at 12 o'clock position). Crossover: Set frequency cutoff point. Phase: Align with main speakers. Power: Auto/On/Off modes. Input Level: Adjust sensitivity for line-level signals.

Connecting to Audio Systems

Multiple connection options for different setups.

1. Home Theater: Connect LFE output from A/V receiver to subwoofer LFE input.
2. Stereo System: Use line-level outputs from preamp or receiver.
3. Speaker Level: Connect speaker wires from amplifier (if equipped).
4. Turn off all equipment before making connections.

Tip: Use high-quality shielded cables to minimize interference.

Operation & Adjustment

Fine-tune subwoofer for optimal performance.

1. Volume: Set to blend seamlessly with main speakers.
2. Crossover: Match to main speakers' low-frequency capability.
3. Phase: Adjust while listening for maximum bass output.
4. Auto Power: Unit turns on automatically when signal detected.
5. Break-in: Allow 20+ hours of play for optimal performance.

WARNING! Avoid extreme volume levels that cause distortion.

Phase & Crossover Settings

Critical adjustments for system integration.

Phase Control: Rotate knob while playing bass-heavy content. Stop at position where bass is loudest and tightest. Crossover Setting: Set 10-15Hz above main speakers' lowest frequency. For LFE connection, set crossover on receiver instead.

Care & Maintenance

Unplug before cleaning. Use soft, dry cloth for exterior. Avoid liquids and abrasive cleaners.

CAUTION! Do not insert objects into ports. Keep away from moisture and extreme temperatures.

Regulatory Information

FCC Part 15 Class B compliant. CE marked. RoHS compliant. Manufactured to international safety standards. Copyright © Jamo. For support, visit www.jamo.com or contact authorized service centers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Power/connections	Check power connection; verify input source; adjust volume
Distorted sound	Overload/placement	Reduce volume; check for port obstruction; reposition subwoofer
Auto power not working	Signal level	Increase source volume; check connections; switch to always-on mode
Hum or buzz	Ground loop	Use grounded outlet; check cable routing; use ground lift adapter
Weak bass	Phase/crossover	Adjust phase control; verify crossover setting; check placement

Reset: Disconnect power for 30 seconds then reconnect.

Service: Contact authorized Jamo service center for repairs.