1. Product Overview
The JBL Arena series 12-inch (305mm) automotive subwoofer incorporates Selectable Smart Impedance (SSI) technology and features a design optimized for car audio applications. It utilizes light and agile 2/2.5-inch voice coils within a magnetic gap for linear control of cone excursion. The Symmetrical Field Geometry™ design contributes to linear cone travel and reduced distortion. Construction materials include a cast-aluminum frame, concave cone, nitrile butadiene rubber (NBR) surround, gold-plated speaker-terminal binding posts, a progressive spider, and a vented pole piece. This subwoofer is designed to handle peak power up to 2400 watts (with RMS ratings of 400/700/800 watts depending on model variant), with components engineered for voice coil cooling and sustained output.
Key Features
- Unrivaled power handling: Engineered for high power output, capable of handling up to 2400 watts peak power (400/700/800 watts RMS).
- Dual voice coil design: Features dual 2/2.5-inch voice coils suspended in separate magnetic gaps for linear cone control and reduced nonlinearities.
- Die-cast, vented aluminum frame: Provides significant venting and heatsink fins for enhanced power handling and maintains voice coil alignment.
- Composite paper full-edge subwoofer dust cap and cone: Utilizes lightweight and rigid composite paper for efficient air movement without flex or distortion.
- Grilles included.
Image 1: Front view of the JBL Arena 12-inch (305mm) High-Performance Automotive Subwoofer, showcasing the cone and surround.
2. Package Contents
Verify that all items listed below are included in your package:
- 1 x Powered subwoofer
- 1 x Bass volume remote control
- 2 x High-level input wiring harness
- 1 x 25A fuse
3. Technical Specifications
Image 2: Rear view of the JBL Arena 12-inch subwoofer, showing the speaker terminals and model information.
| Specification | Value |
|---|---|
| Model Name | JBLSUBAR12AM |
| Speaker Type | Subwoofer |
| Compatible Devices | Car audio systems |
| Subwoofer Diameter | 12 Inches (305mm) |
| Color | Black |
| Is Waterproof | FALSE |
| Number of Items | 1 |
| Control Method | Voice (via connected head unit/amplifier) |
| Power Source | Corded Electric |
| Vehicle Service Type | Car |
| Audio Driver Type | Dynamic Driver |
| Subwoofer Connectivity Technology | Wired |
| UPC | 050036384209 |
| Manufacturer | JBL |
| Product Dimensions | 7.48 x 12.99 x 12.99 inches |
| Item Weight | 27.3 pounds |
| Speaker Maximum Output Power | 2400 Watts (Peak) |
| Connectivity Technology | Wired |
| Mounting Type | Flush Mount |
Image 3: Rear view of the JBL Arena 12-inch subwoofer, illustrating the robust magnet and frame structure.
4. Installation Guide
Proper installation is crucial for optimal performance and safety. It is highly recommended that installation be performed by a qualified professional car audio installer.
4.1 Safety Precautions
- Disconnect the vehicle's negative battery terminal before starting any electrical work.
- Wear appropriate safety gear, including eye protection.
- Ensure all wiring is properly insulated and secured to prevent shorts and damage.
- Avoid routing wires near sharp edges or moving parts.
4.2 Wiring Connections
The subwoofer requires connection to an external amplifier. Refer to your amplifier's manual for specific wiring diagrams and power requirements. General connections include:
- Power Wire: Connect to the vehicle's positive battery terminal via a fuse (25A fuse included).
- Ground Wire: Connect to a clean, unpainted metal surface on the vehicle chassis.
- Remote Turn-On Wire: Connect to the amplifier's remote turn-on input, typically from the head unit.
- Audio Input: Connect the amplifier's speaker output terminals to the subwoofer's gold-plated binding posts. Ensure correct polarity (+ to + and - to -). The dual voice coil design allows for various wiring configurations (series or parallel) to match the amplifier's impedance requirements. Consult a professional for optimal impedance matching.
4.3 Mounting
The subwoofer is designed for flush mounting. Select a suitable enclosure (not included) that meets the manufacturer's recommended volume specifications for optimal acoustic performance. Secure the subwoofer firmly within the enclosure using appropriate hardware.
- Ensure the mounting location provides adequate clearance for the subwoofer's depth and allows for proper ventilation.
- Avoid mounting in locations exposed to excessive moisture or direct sunlight.
5. Operation
Once installed and connected to an amplifier, the subwoofer will reproduce low-frequency audio signals. Adjustments for bass level and crossover frequency are typically made on the connected amplifier or head unit.
- Bass Volume Remote Control: Use the included bass volume remote control to adjust the subwoofer's output level conveniently from the driver's seat.
- Crossover Settings: Set the low-pass filter on your amplifier to prevent higher frequencies from reaching the subwoofer, ensuring clean bass reproduction. A typical starting point is 80-100 Hz.
- Gain Adjustment: Carefully adjust the amplifier's gain setting to match the output of your head unit without introducing distortion.
6. Care and Maintenance
- Cleaning: Use a soft, dry cloth to clean the subwoofer cone and frame. Avoid using harsh chemicals or abrasive cleaners.
- Inspection: Periodically check all wiring connections for tightness and signs of corrosion. Inspect the subwoofer surround for any tears or damage.
- Environmental Conditions: While designed for automotive use, avoid exposing the subwoofer to extreme temperatures or excessive moisture. The product is not waterproof.
7. Troubleshooting
If you experience issues with your JBL subwoofer, consult the following common troubleshooting steps:
- No Sound:
- Check all power, ground, and remote turn-on connections. Ensure the fuse is intact.
- Verify the amplifier is powered on and receiving an audio signal from the head unit.
- Confirm speaker wires are correctly connected to both the amplifier and the subwoofer, maintaining proper polarity.
- Distorted Sound:
- Reduce the amplifier's gain setting.
- Check the head unit's volume and bass boost settings; excessive levels can cause distortion.
- Ensure the subwoofer is not over-excursing (moving too far in and out).
- Verify the amplifier is not clipping (indicated by a distortion light on some amplifiers).
- Weak Bass Output:
- Increase the amplifier's gain or the bass level on the remote control.
- Check the amplifier's low-pass filter setting; it might be set too low.
- Ensure the subwoofer is wired for the correct impedance for your amplifier.
8. Warranty and Support
8.1 Warranty Information
This JBL subwoofer comes with a Limited Warranty. Please refer to the warranty card included with your product or visit the official JBL website for detailed terms and conditions regarding coverage and duration.
8.2 Customer Support
For technical assistance, service, or further inquiries, please contact JBL customer support. Contact information can typically be found on the JBL official website or in the product packaging.
