Product Overview
The JENSEN JA2CH Class-D 2-Channel Car Audio Amplifier is designed to deliver efficient and powerful audio performance for various applications, including motorcycles, ATVs/UTVs, and golf carts. This amplifier features a Class-D design, offering versatile crossover options suitable for both stereo sound and bridged subwoofer applications. It provides clean power and reliable performance.
Front view of the JENSEN JA2CH Class-D 2-Channel Car Audio Amplifier, showcasing its compact and robust design.
Key Features:
- Class-D 2-Channel Amplifier: Efficient and high-performance design.
- Power Output: 600 Watts Peak Power; 80 Watts RMS x 2 channel @ 4 ohms; 120 Watts RMS x 2 channel @ 2 ohms; 240 Watts RMS x 1 channel @ 4 ohms (Bridged).
- Crossovers: High Pass & Low Pass Crossovers with variable bass boost at 45Hz.
- Protection: Built-in thermal DC offset safety protection for short circuits.
- Inputs: High-level input (speaker wire) and low-level input (RCA).
- Outputs: RCA pass-thru outputs for system expansion.
- Adjustability: Selectable high pass/low pass/full range crossovers and adjustable gain.
- Design: Compact and 2 Ohm stable operation.
Visual representation of key features including compact design, RCA & speaker wire inputs, Class D high-efficiency design, and 600 watts peak power.
Setup and Installation
Proper installation is crucial for optimal performance and safety. Ensure the vehicle's battery is disconnected before beginning installation. Mount the amplifier in a location that allows for adequate ventilation and is protected from moisture and excessive heat.
Wiring for 2 Speakers:
Connect your audio source (head unit) to the amplifier's RCA inputs. Connect the amplifier's speaker outputs to your two speakers. Ensure proper polarity for all connections.
Diagram illustrating the connection of the JENSEN JA2CH amplifier to two speakers, including RCA cables from the source, power, ground, and remote turn-on lead connections to the battery.
Wiring for 1 Subwoofer (Bridged Mode):
For a single subwoofer application, the amplifier can be bridged to provide higher power output. Connect the RCA inputs from your audio source. Bridge the amplifier's two channels according to the manual's specific instructions (typically using the positive terminal of one channel and the negative terminal of the other). Connect the bridged output to your subwoofer.
Diagram illustrating the connection of the JENSEN JA2CH amplifier to one subwoofer in bridged mode, including RCA cables from the source, power, ground, and remote turn-on lead connections to the battery.
Power and Ground Connections:
Connect the B+ (BAT+) terminal to the positive terminal of the vehicle's battery using an appropriate gauge power wire and an inline fuse within 18 inches of the battery. Connect the GND (Ground) terminal to a clean, unpainted metal surface on the vehicle's chassis. Connect the REM (Remote) terminal to the remote turn-on lead from your head unit.
Close-up view of the amplifier's rear panel, detailing the power (BAT+, REM, GND), fuse, and speaker output terminals. Note the blue and red indicator lights for power and protection.
Operating the Amplifier
The JENSEN JA2CH amplifier offers various controls to fine-tune your audio experience. These controls are typically located on the side panel of the unit.
Control Panel Overview:
Close-up view of the amplifier's front panel, displaying the Bass Boost, Frequency (FREQ), Crossover (X-OVER), Gain, Line Input (RCA), Line Out (RCA Pass-Thru), and High Input connections.
Adjustments:
- Gain Control: Adjusts the input sensitivity of the amplifier to match the output of your head unit. Start with the gain at minimum and slowly increase until desired volume is achieved without distortion.
- Crossover (X-OVER): Select between Low Pass Filter (LPF), High Pass Filter (HPF), or Full Range (FULL).
- LPF (Low Pass Filter): Allows only low frequencies to pass through, ideal for subwoofers.
- HPF (High Pass Filter): Allows only high frequencies to pass through, ideal for full-range speakers to prevent distortion from low bass.
- FULL (Full Range): Allows all frequencies to pass through.
- Frequency (FREQ): Adjusts the cutoff frequency for the LPF or HPF, typically ranging from 30Hz to 320Hz.
- Bass Boost: Provides an adjustable bass boost at 50Hz, ranging from 0dB to 12dB, to enhance low-frequency output.
The JENSEN JA2CH amplifier features 2 Ohm stable operation, variable gain adjustment, selectable high pass/low pass/full range crossover, and Class D Design for great sound.
Maintenance
To ensure the longevity and optimal performance of your JENSEN amplifier, follow these maintenance guidelines:
- Keep the amplifier clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- Ensure proper ventilation around the amplifier to prevent overheating. Do not block cooling fins.
- Regularly check all wiring connections for tightness and corrosion. Loose connections can lead to poor performance or damage.
- Avoid exposing the amplifier to extreme temperatures or moisture.
Troubleshooting
If you experience issues with your JENSEN JA2CH amplifier, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power / Amplifier not turning on | Blown fuse, loose power/ground/remote wire, faulty remote turn-on signal. | Check and replace fuse if necessary. Verify all power, ground, and remote connections are secure. Test remote wire for 12V signal. |
| No Sound Output | Loose RCA cables, incorrect input selection, speaker wires disconnected, amplifier in protection mode. | Ensure RCA cables are securely connected. Check input mode setting. Verify speaker wire connections. Check for protection light (red) and address cause (overheating, short circuit). |
| Distorted Sound | Gain set too high, improper crossover settings, poor ground connection, speaker impedance mismatch. | Reduce gain setting. Adjust crossover frequency or type. Ensure ground connection is solid. Verify speaker impedance matches amplifier's capabilities. |
| Amplifier Overheating | Insufficient ventilation, impedance too low, prolonged high volume use. | Ensure amplifier has adequate airflow. Check speaker impedance. Reduce volume or allow amplifier to cool down. |
The amplifier includes a thermal DC offset safety protection feature. If the amplifier detects an issue, it may enter protection mode (indicated by a red light) to prevent damage. Address the underlying cause before resuming operation.
Specifications
| Feature | Detail |
|---|---|
| Model Number | JA2CH |
| Brand | Jensen |
| Amplifier Type | Class-D 2-Channel |
| Peak Power | 600 Watts |
| RMS Power (4 ohms) | 80 Watts x 2 Channel |
| RMS Power (2 ohms) | 120 Watts x 2 Channel |
| RMS Power (Bridged 4 ohms) | 240 Watts x 1 Channel |
| Voltage | 12 Volts (DC) |
| Mounting Type | Freestanding |
| Package Dimensions | 8.9 x 7.52 x 4.29 inches |
| Item Weight | 2.87 Pounds |
Official Product Video
This video provides an overview of the JENSEN Class-D Amplifier series, including the JA2CH model. It highlights key features such as compact design, Class D technology, high and low-level inputs, and various channel configurations (1-channel, 2-channel, 4-channel, 5-channel). The video also emphasizes the power, efficiency, and performance of these amplifiers.
Warranty and Support
The JENSEN JA2CH amplifier comes with a standard 2-year warranty. You can extend this to a 3-year warranty by registering your product on Jensenmobile.com.
For technical support, troubleshooting assistance, or warranty claims, please visit the official Jensen website or contact their customer service department. Refer to the product packaging or the Jensenmobile.com website for the most current contact information.
