OEM car radios are not equipped with line outputs. This makes it a little difficult to connect amplifiers to them without a high-amplitude input. Some manufacturers of auto accessories for connecting car amplifiers produce special matching devices - line input adapters. The use of this device makes it much easier to connect the amplifier to a radio tape recorder without line outputs.
It is necessary
screwdriver, wire cutters, electrical tape, line-in adapter
Instructions
Step 1
When you start connecting your amplifier to a car radio without line outputs, buy a line-in adapter for your amplifier. With it, you can match the output signal to the desired input value of the amplifier. These values are very different from manufacturer to manufacturer. For example, the input voltage of the SONY amplifiers is 8V, and the same parameter of the Kenwood amplifier is 0.8V.
Step 2
Remove the car radio and connect the line-in adapter to the radio. To do this, connect the input wires of the adapter with the acoustic wires of the radio according to the connection diagram.
Step 3
Set the signal output voltage value according to the required value for the amplifier. Try not to exceed this parameter, otherwise the volume control will be stepped, with a sharp increase in the sound intensity with each step of increasing the volume. In addition, the amplifier will prematurely reach full power, and when trying to add volume, it will overload and produce a distorted wheezing sound. This is very harmful to speakers.
Step 4
Attach the line-in adapter to the wire harness with electrical tape. Make sure it fits freely behind the console. In order to reduce the possible bounce of the adapter body on the internal parts of the console, wrap it in 1 layer of foam rubber 10 mm thick. Foam rubber can be fixed with electrical tape.
Step 5
Connect the line cable to the adapter outputs, observing the markings of the line outputs.
Step 6
Connect the power wires to the amplifier - the amplifier turn-on control wire and the speaker wiring.
Step 7
Connect the line wires to the amplifier according to their markings.
Step 8
Perform a test switch-on and check for correct signals. The sound of each speaker should match its location. For example, use the Fader / balance knob to move the sound to the right side. In this case, only the right speakers should sound, then transfer the sound to the front speaker. Now only the front right speaker will sound. If everything sounds from the right place, the connections are correct.
Step 9
Test the amplifier for the correct input signal. To do this, set the volume on the radio tape recorder to 70% of the maximum. Use the volume control on your amplifier to turn down the volume. If there is no distortion, then the input signal is correct.
Step 10
Reinstall the radio.
Step 11
Adjust the maximum volume of the amplifier using its built-in controls. The volume knob on the radio should be set to 70% of the maximum value.
