JBL JBLA120W

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JBL Stage A120 Bookshelf Speaker Instruction Manual

Model: JBLA120W | Brand: JBL

1. Introduction

Welcome to your new JBL Stage A120 bookshelf speakers. These compact 2-way speakers feature a 114mm Polycellulose cone woofer and a horn-loaded tweeter, delivering clear highs and powerful lows. Designed with HDI (High Definition Imaging) waveguide technology, they provide a wide and consistent soundstage for an immersive listening experience.

Two JBL Stage A120 bookshelf speakers, one with its grille removed showing the woofer and tweeter, and the other with its grille on.

Image: The JBL Stage A120 bookshelf speakers, showcasing their design and components.

Key Features

  • 2-year manufacturer's warranty for new domestic genuine products.
  • JBL's unique constant directivity horn design.
  • 25mm aluminum dome tweeter for transparent high frequencies.
  • Polycellulose cone woofer.
  • Optimized crossover network to enhance unit performance.
  • Optimized cabinet design.
  • Elegant cabinet design.
  • System configuration that excels in multi-channel playback.
  • Output sound pressure level: 86dB (2.83V/1m).

2. Package Contents

Please verify that all items are included in the package:

  • Adhesive rubber feet x 8
  • Port tube inserts x 2
  • Grilles x 2
  • Wall mount brackets x 4
  • Screws for wall mount brackets x 8

3. Setup

Speaker Placement

Proper speaker placement is crucial for optimal sound performance.

  • Place speakers on a stable, level surface.
  • For stereo listening, position speakers equidistant from the listening position, forming an equilateral triangle.
  • Ensure speakers are at ear level when seated.
  • Maintain a distance from walls to allow bass reflex ports to function correctly.

Connecting to Your Amplifier

Use high-quality speaker cables to connect your JBL Stage A120 speakers to your amplifier.

  • Identify the positive (+) and negative (-) terminals on both the speaker and the amplifier.
  • Connect the red (+) terminal on the speaker to the red (+) terminal on the amplifier.
  • Connect the black (-) terminal on the speaker to the black (-) terminal on the amplifier.
  • Ensure all connections are secure to prevent short circuits.
Rear view of a single JBL Stage A120 speaker, showing the bass reflex port and the red and black speaker terminals.

Image: Rear view of the JBL Stage A120 speaker, showing the bass reflex port and the red and black speaker terminals for connecting to an amplifier.

4. Operation

Initial Power-On

Before powering on your amplifier, double-check all connections. Start with the amplifier volume at its lowest setting.

Adjusting Volume and Tone

Gradually increase the volume to a comfortable listening level. Use your amplifier's tone controls (bass, treble) sparingly to fine-tune the sound to your preference.

Break-in Period

Like many audio components, your speakers may benefit from a "break-in" period. Play music at moderate volumes for several hours to allow the drivers to settle and achieve their optimal performance.

5. Maintenance

Cleaning

Dust the speaker cabinets regularly with a soft, dry cloth. For stubborn marks, use a slightly damp cloth, then dry immediately. Avoid abrasive cleaners or solvents.

Grille Care

The speaker grilles protect the drivers. They can be carefully removed for cleaning or if you prefer the aesthetic of the exposed drivers. Clean grilles with a soft brush or vacuum cleaner with a brush attachment.

Environmental Considerations

Avoid placing speakers in direct sunlight, near heat sources, or in areas with high humidity. Extreme temperatures or moisture can damage the cabinet and internal components.

6. Troubleshooting

ProblemPossible CauseSolution
No SoundPower off/disconnected, incorrect input selected, faulty cable.Ensure amplifier is powered on and connected. Select correct input source. Check speaker cables for secure connection.
Distorted SoundVolume too high, faulty source, damaged speaker.Reduce volume. Test with a different audio source. Inspect speaker drivers for visible damage.
Weak BassIncorrect speaker placement, phase issue, port blocked.Adjust speaker position (away from walls). Check speaker wiring for correct polarity (+ to + and - to -). Ensure bass reflex port is not obstructed.
No Highs/LowsDamaged tweeter/woofer, crossover issue.Gently test individual drivers (e.g., by playing music with strong highs/lows). If a specific driver is silent, contact support.

7. Specifications

Rear view of the JBL Stage A120 speaker with dimensions labeled: 28.5cm height, 18.5cm width, 17cm depth.

Image: Rear view of the JBL Stage A120 speaker with its dimensions.

Product Recommended UseVolume
Subwoofer Diameter114 mm
ColorWood
Included ComponentsAdhesive rubber feet x 8, Port tube inserts x 2, Grilles x 2, Wall mount brackets x 4, Screws for wall mount brackets x 8
Product Dimensions (D x W x H)17 cm x 18.5 cm x 28.5 cm
Product Weight3.8 kg
Impedance6 Ohms
WaterproofNo
Product Model NumberJBLA120W
Manufacturer DiscontinuedNo
Speaker TypePassive
BrandJBL
Speaker Maximum Output120 Watts
Connectivity TechnologyWired
Mounting TypeTabletop Mount
Speaker ConfigurationBookshelf, Subwoofer, Center Speaker (referring to system compatibility)

8. Warranty and Support

Warranty Information

This product comes with a 2-year manufacturer's warranty for new domestic genuine products. Please retain your proof of purchase for warranty claims.

Customer Support

For further assistance, technical support, or warranty inquiries, please visit the official JBL website or contact their customer service department.

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