Many people choose to purchase and install a car audio system in order to improve the sound quality of their car. However, installing a power amplifier requires more skill than installing a receiver or a speaker. Knowing the precautions during installation can reduce the failure of the car audio system in the future. Probability. It is best not to install the wiring privately to guard against accidents. The best way is to find a professional store to install. installation The first step: make preparations A distance of at least 90 cm must be maintained between the amplifier and the receiver to avoid electrical system interference. At the same time, the amplifier will have an adverse effect on the receiver AM/FM reception. If the amplifier is mounted on the side door, care should be taken to keep the heat sink fins vertical. There should be enough space around the perimeter for wiring and adjustment. Suitable locations for installation are: Under the seat Advantages: Due to the proximity to the receiver, shorter wires can be used to avoid noise effects and signal degradation. At the same time, because it is closer to the front speakers, it makes it easier to connect the speaker cable and does not occupy the space for storing luggage. Disadvantages: The seat has to be removed and installed, the large-sized amplifier is not suitable, and the power amplifier must be overhead to avoid entering the rainwater humidifier of the cabin. Fire board (side passenger seat side) Advantages: Shorter wires can also be used without having to remove the seat. Disadvantages: Suitable for small power amplifiers and close to noise sources. Inside the trunk Advantages: There is enough room to install a large amplifier, which is closer to the rear speakers. Disadvantages: Some storage space will be sacrificed and the wire used will be longer. Step 2: Install the amplifier First place it properly, then mark the landing position of the amplifier mounting bracket foot, drill the hole for the mounting bolt, then install the power amplifier, and confirm that the bolt is tightened to ensure safety. When drilling holes, be careful not to pierce the oil supply pipe or brake oil pipe. If the amplifier is installed in the trunk, be careful not to pierce the tank. The amplifier itself should not be in direct contact with the chassis, otherwise it will generate noise. When installing, the rubber can be placed under the bracket. The third step: wiring Disconnect the battery negative wire before wiring. Power, input, and output are wired. Most amplifier manufacturers do not provide wire, but these wires are easy to buy. Connect the power cord: The power cord is routed from the vehicle battery to the amplifier, and the power cord is as thick as possible. A fuse or circuit breaker must be installed close to the battery, otherwise an electrical short can cause a fire and damage the amplifier. Connect the power cord to the positive battery and then to the amplifier through the interior of the vehicle. To conceal the wire, the door sill can be removed. The ground wire must be in contact with bare metal on the vehicle chassis. Connect the input signal line: If the receiver has an RCA preamplifier output terminal, the amplifier has a preamplifier input terminal, which can be connected via the RCA terminal signal line. The output signal level of the pre-stage is determined by the manufacturer, so it is necessary to confirm that the amplifier input is equal to the output level of the receiver. If the receiver does not have an RCA preamplifier output terminal, the amplifier can receive the signal directly from the receiver's speaker output terminal. At this time, the wire is taken out from the receiver output terminal of the receiver and connected to the high-level input terminal of the power amplifier. Connect the output signal line: Drive the speaker with a speaker cable to connect the speaker to the amplifier. If you upgrade on the original system and do not want to re-route, you can directly use the original speaker cable. Some power amplifiers have a pre-stage signal output function, which can be used to send a pre-amplified signal to another power amplifier through the RCA signal line to establish a multi-amplifier system. After adjusting and reconnecting the battery negative wire, you can start testing the amplifier. Turn on the power and turn on the radio. The amplifier should start working and you can hear the sound from the speaker. At this point, you can make adjustments. If you want to improve the signal clarity, you can adjust the amplifier input sensitivity to a minimum. Play the tape or CD, and increase the receiver volume. If it is distorted, reduce the volume until the distortion disappears. At this time, the system signal-to-noise ratio is optimal, and engine noise interference can also be avoided. Keep this volume, then increase the gain of the amplifier. If distortion occurs, gradually decrease the gain until the distortion disappears. Common malfunctions Symptom: There is no sound. Remedy: Correct the gain; check the fuse and wiring for open circuit; directly input the signal from the receiver to the speaker to confirm that the speaker is working properly. Symptom: The speaker body is not trembled. Remedy: Ensure that the power and grounding wires of the amplifier are secure; ensure that there are no direct contact between the positive and negative poles of the speaker; check that any wiring is not loose; replace the wire. Symptom: Only one channel has sound. Remedy: Confirm that the receiver balance switch is in the middle position; confirm that the signal line is firmly connected; change the left and right channel signal lines to confirm that the signal line is not broken inside; check if the speaker line is properly connected; directly input the signal from the receiver to the speaker , confirm that the speaker is working properly. Symptom: The output volume is weak or the sound is distorted. Remedy: Check if the input sensitivity setting is correct, whether the receiver balance switch is in the middle position; confirm that the signal line is connected firmly; check whether the receiver and the amplifier ground and the speaker cable are connected at both ends; replace the signal line; directly from the signal The receiver is input to the speaker to confirm that the speaker is working properly; confirm that the speaker is in the correct phase. Symptom: The amplifier is automatically cut off at a large volume. Remedy: Check if the input sensitivity setting is too high, whether the ventilation around the amplifier is good, whether the bass control is at the maximum state, and whether the loudness switch is always on; confirm that the power amplifier is grounded reliably; use the thick power cord; if the load is 2Ω, confirm whether the amplifier is Can withstand. Boiler Pressure Gauge,Inflatable Pump Pressure Gauge,Mini-Sized Theromanometer Pressure Gauge,Gauge Pressure ZHOUSHAN JIAERLING METER CO.,LTD , https://www.zsjrlmeter.com