The CD-player is one of the most important components in a car audio system and often the first item to be upgraded. The Sony CDX-MP40 is an aftermarket CD-player which offers more features than most stock CD-players, such as MP3 support and pre-amplified outputs which allow you to connect a power amplifier and build a more powerful sound set-up. Installing an aftermarket CD-player is not a difficult task, even though there seem to be a lot of wires to work with at first sight; knowing where each wire goes and what it does makes it simple, however.
- Skill level:
- Moderately Easy
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Turn off the ignition to prevent short circuits.
Locate the multi-pin connector socket on the back of the CD-player and plug in the connector with the cables supplied with the CD-player.
Identify the black wire and connect it to a grounding point before proceeding with other wire connections.
Locate your antenna connector. It should be a circular connector with a pin in the middle. Connect it to the antenna connector on the CDX-MP40 located in the lower-left part on the rear panel. Optionally connect the blue wire to a powered antenna or antenna booster "remote" terminal.
Connect the auxiliary CD/MD changer to the BUS In ports located to the right of the antenna connector. Connect the CD/MD changer bus out to the "Bus Control In" port located in the lower-right part of the rear panel. This step applies only if your set-up includes a CD/MD changer.
Connect your power amplifiers that power your front and rear speakers to the "Audio Out Front," respectively "Audio Out Rear" outputs. Also connect the blue/white stripped connector to the "remote" port on the amplifiers. If your set-up doesn't include external amplifiers and relies on the internal amplifier of the CD-player to power the speakers, skip this step.
Connect the optional rotary controller to the "Remote In" port located on the lower-right.
Connect the light-blue wire to the interface cable of a car telephone, if any. This is the attenuator control which will automatically lower the volume of the audio system if a phone call is placed.
Identify the speaker wires. There are four pairs of wires, each consisting of a solid-colour wire and a black-stripped wire. Each solid-coloured wire connects to a positive terminal of a speaker and the stripped wire connects to the negative terminal.
Connect the white pair of wires to the front left speaker and the grey pair of wires to the front right speaker.
Connect the green pair of wires to the rear left speaker and the purple pair to the rear right speaker.
Connect the red wire to a 12-volt power source which is powered in the "accessory" position of the ignition. If you don't have such power source, connect it directly to the positive terminal of the battery.
Connect the yellow wire to the positive terminal of the battery or a power source that's permanently energised.
Speakers and Power
Tips and warnings
- Consider having an expert mount the CD-player if you're not comfortable with working with your car's electrical system.
- To prevent short circuits, assure all the connections are tight and no wires are left non-insulated.
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