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Explains the benefits of using the A222HLX amplifier for improved sound quality and loudness.
Details suitable mounting locations for the amplifier and the importance of proper ventilation.
Guides on choosing compatible speakers to maximize performance with the A222HLX.
Adjusts the amplifier's sensitivity to match the audio source's output level for optimal signal.
Allows for crossover frequency adjustment to tailor audio output for different speaker types or systems.
Connects the amplifier's output channels to the vehicle's speakers.
Connects the amplifier to the source unit using RCA cables for superior audio input.
Provides an alternative input method using speaker-level outputs from the source unit.
Essential connection to the vehicle's chassis for a safe and effective ground.
Direct connection to the vehicle's battery for a stable power supply.
An indicator light showing that the amplifier is receiving power.
Enables automatic turn-on/off of the amplifier with the car stereo.
Specifies the required fuse type and rating for unit protection.
Lists all components and hardware included in the amplifier's packaging.
Details the necessary tools and materials required for a successful installation.
Guides on setting the Low Pass Filter for subwoofer integration, especially in bridged mode.
Explains using the High Pass Filter to protect speakers and enhance sound quality.
Configuration option for bypassing the internal crossover filtering.
Explains how to connect either high-level or low-level audio inputs, but not both simultaneously.
Illustrates how to connect the amplifier's input signals and power to the car's radio system.
Details the proper grounding for high-level input connections to prevent noise.
Shows how to connect the amplifier's speaker outputs to the left, right, and subwoofer.
Emphasizes the critical need for a low pass filter when connecting subwoofers to prevent damage.
Reinforces the importance of a secure chassis ground connection for amplifier operation.
Explains connecting the sensing wire to the power antenna lead or switched ignition source.
Details the direct connection to the vehicle's battery with proper gauge wire.
Addresses issues where the power LED is not illuminated when the system is on.
Solutions for when the radio volume needs to be excessively high for the amplifier to function.
Guidance for when the radio volume is too sensitive or loud.
Troubleshooting steps for audio only coming from one speaker.
Explains how to resolve distorted audio output from the amplifier.
Common causes and fixes for the amplifier repeatedly blowing fuses.
Techniques to eliminate or reduce ignition noise or whine in audio outputs.
How to fix loud popping sounds when turning the amplifier on or off.
Addresses situations where the amplifier shuts down, often due to heat or protection.
Troubleshooting for insufficient or no audio output when using bridged configuration.
General steps for diagnosing and resolving a complete lack of audio output.
Advice on contacting technical assistance for unresolved troubleshooting issues.
Detailed technical data including power output, frequency response, and impedance.
Outlines the warranty period, what is covered, and who is protected.
Instructions on how to get the product serviced under warranty.
Details exclusions, limitations on implied warranties, and consequential damages.
The Jensen A222HLX is a two-channel power amplifier designed for automotive sound systems, offering significant enhancements to audio quality and volume. Its primary function is to amplify audio signals, providing a fuller, richer sound even at low volume levels, and enabling the use of more powerful speakers for a louder listening experience. This amplifier delivers 50 watts RMS per channel and can be bridged to provide 150 watts RMS, making it suitable for driving a variety of speaker configurations, including subwoofers.
One of the key usage features of the A222HLX is its flexibility in input connections. It supports both high-level inputs (speaker level) and low-level inputs (RCA phono), with low-level inputs generally recommended for the least harmonic distortion. An important note for users is to never connect both high-level and low-level inputs to the same inputs simultaneously. The amplifier also includes an input sensitivity control, which allows users to adjust the sensitivity to match the input level from their receiver, ensuring optimal performance and preventing distortion. For best results, the sensitivity should be adjusted to the lowest possible levels and then fine-tuned for the desired balance between front and rear speakers.
The A222HLX incorporates a versatile crossover system with options for low pass filter (LPF), high pass filter (HPF), and flat (no filter) settings. The LPF is ideal for subwoofers, blocking high frequencies and directing only bass to the subwoofer. The HPF is designed to block low frequencies, improving speaker life and sound quality for full-range speakers. The flat setting bypasses any filtering. When connecting a subwoofer, it is crucial to use a low pass filter to prevent damage to the speaker and amplifier, as subwoofers have unique electrical requirements.
Installation is made flexible by the amplifier's compact design, allowing it to be mounted in various locations such as under a seat, in the trunk, or under the dashboard. However, proper placement is critical due to the heat generated by amplifiers. Users should select a location where air can circulate freely around the amplifier and avoid covering it with carpets or enclosing it behind interior trim panels.
The amplifier's power management features include a power terminal for direct connection to the vehicle battery (using a minimum of 10-gauge wire), a ground terminal for a clean chassis ground connection, and a remote sensing terminal. The remote sensing terminal connects to the radio's power antenna lead, allowing the amplifier to turn on automatically with the receiver. If a power antenna lead is unavailable, this wire should be connected to a +12 VDC source that switches on with the ignition. A red power light indicates when 12-volt and DC power are available at both the battery +12 volt and sensing wires.
For maintenance and safety, the A222HLX is equipped with electronic protection circuitry to guard against short circuits, DC offset, and thermal overload. It also features a unique, super-efficient heat sink design to manage heat dissipation. In the event of a fuse replacement, it is imperative to use only a 25 amp blade-type fuse of the correct type and amperage to prevent damage to the unit.
Troubleshooting guidance is provided to address common issues such as the amplifier not operating, radio volume being too high or sensitive, sound coming from only one speaker, distorted sound, blown fuses, alternator whine, loud pops in speakers, and the amplifier shutting down due to overheating. These solutions often involve checking connections, adjusting input sensitivity, insulating speaker wires, or ensuring proper grounding. For instance, if alternator whine occurs, users might need to disconnect audio inputs to isolate the problem or install a power line filter. If the amplifier shuts down due to high volume, turning down the radio or changing to 4-ohm speaker loads (if 2-ohm loads were used) can resolve the issue.
The A222HLX is designed to be user-friendly, but proper installation is paramount for optimal performance and longevity. While many installations can be handled by a do-it-yourselfer with reasonable tools and patience, those lacking these requirements are advised to seek assistance from an authorized Jensen dealer/installer. For technical assistance with operation or installation, a dedicated support line is available. When returning the unit for service, enclosing the original, dated bill of sale is necessary.
Power| peak power output | 250 Watts |
|---|---|
| power requirement | 14.4 VDC |
| fuse requirements | 25 amp blade-type fuse |
Audio Specifications| frequency response | 10 Hz-30kHz ±3 dB |
|---|---|
| signal to noise ratio | >80 dB |
| channel separation | >65 dB, 1 kHz |
Impedance| speaker impedance | 2-8 ohms |
|---|---|
| input impedance low level | 10 k ohms |
| input impedance high level | 27 ohms |
Dimensions| width | 9.25" |
|---|---|
| height | 5" |
| depth | 7.6" |
