Incorrect connection of wires with contacts of the head unit often causes wheezing, distortion of sound or complete failure of the acoustic system of the car. If you notice that after installing a new tape recorder dynamics does not work or sounds quieter than others, the problem lies in a violation of the switching circuit or poor contact in the twisting places. Accurate polarity and the use of appropriate cross-sectional conductors directly affect the quality of low frequency reproduction and the overall volume of the system.
The installation process requires careful attention to the marking of conclusions, since modern head unit (Head units) have a strictly regulated sling. An error in the connection of plus and minus will lead to antiphase, which is why the bass component of the sound will almost disappear, and the load on the amplifier will increase. Before starting work, it is necessary to disconnect batteryTo avoid short circuits that can disable expensive electronics.
Quality acoustics It requires not only mechanical connection of wires, but also an understanding of the principles of the electric circuit in the car. Onboard network voltage, generator interference and tipping from other instruments can significantly worsen sound if you do not use shielded cables or improperly pave the track. In this article, we will discuss the technical nuances that will allow you to build a reliable system without the help of professionals.
⚠️ Attention: Never connect speakers with a resistance below the instructions to a radio (usually 4 ohms). Connecting a 2-ohm load can lead to overheating and failure of the built-in amplifier.
Required tools and materials for installation
For the high-quality implementation of the project for the installation of acoustics, you will need specialized tools that will ensure the reliability of connections. The main element is acoustical, which should be copper, with a sufficient number of veins and high-quality insulation, resistant to temperature changes. The use of wires from household appliances or too thin veins will lead to power losses and heating of the track at high volume.
An important stage of preparation is the choice of connecting elements. For the wires rolling is best used connectors Or soldering, as a simple twist over time oxidizes and begins to sparkle. You will also need shrink tubes to insulate the joints, screeds to fix the harnesses and a multimeter to check the integrity of the chain.
- 🔧 A set of screwdrivers and tenants for dismantling plastic panels of the cabin.
- 🔪 A stationery knife or stripper to clean the insulation without damaging the veins.
- 🧵 High quality insulation and thermal shrinkage of various diameters.
- 🔌 Clem pads or special adapters under the ISO connector.
Do not save on consumables, as vibrations, moisture and temperature changes in the car - this is an aggressive environment. Oxidation of contacts One of the most common causes of sound loss a few months after installation. Using tinted copper wires will significantly extend the life of your audio system.
For laying wires in doors, use rubber corrugated corrugated to avoid rubbing the insulation when opening and closing doors.
Connection schemes and connector slinging
Most modern car radios use a standardized connector. ISOThis simplifies the installation process. However, the color marking of the wires may differ depending on the manufacturer of the head unit and the car. The standard scheme involves the division of channels into front (front) and rear (back), as well as polarity division.
Usually wires have the following color coded: gray and gray-black are responsible for the front right channel, white and white-black are responsible for the front left. The green and green-black pair is designed for the rear left speaker, and the purple and purple-black pair is for the rear right. It is important to understand that colored wires without a black stripe are usually positive (+) and with a band - negative (-).
| Canal | Positive wire (+) | Negative wire (-) | Location. |
|---|---|---|---|
| Front Left | White | White and black | Front left door |
| Front Right | Grey | Grey-black | Front right door |
| Rear Left | Green. | Green and black | Rear left shelf/door |
| Rear Right | Purple. | Purple-black | Rear right shelf/door |
If your car is running a regular wiring different from ISO, you need to use a multimeter in vertebrae mode or give a test signal to identify the wires. In some cases, the manufacture of an adapter is required, since direct cutting of the regular wires of the car is undesirable to preserve the liquidity of the machine. Spinning It must be checked twice before the final connection.
Step-by-step instructions for installing speakers
The installation process begins with the dismantling of decorative linings and the removal of the tape recorder from the seat. Carefully remove the device to access the back where the power connector and acoustic outputs are located. If you install new speakers in the door, pre-remove the door cards by unscrewing the fasteners and freeing up the plastic clips.
Laying of wires should be carried out bypassing the sharp edges of the metal. Stretching the prepared cables from the place of installation of the tape recorder to the places of installation of speakers, leaving a small margin of length for ease of installation. At the ends of the wires, clean the insulation by 10-15 mm, twist the veins and, if possible, seal them with solder for better contact.
☑️ Checklist before connection
Connect the wires according to the color marking or vertebrae results. Reliably fix the connections with soldering or quality terminals. After connecting each channel, check the system before final assembly. Make sure all speakers are working and the sound is distributed correctly in balance.
⚠️ Attention: When laying wires through metal partitions, be sure to use protective sleeves. Rubbing the insulation against the metal of the body can lead to a short circuit and fire.
Features of connecting subwoofer and amplifier
If the power of the standard amplifier is not enough, owners often decide to install an external amplifier. booster and a subwoofer. In this case, the connection scheme changes: the signal from the linear outputs (RCA) of the magnetol is fed to the input of the amplifier, and already from it powerful signals go to the speakers. This allows you to get a clean sound without distortion even at high volume.
To connect an active subwoofer or amplifier requires laying a separate power cable from the battery through the fuse. The cross-section of this wire shall be at least 4-8 mm2 depending on the power of the equipment. The signal wire (Remote), which controls the amplifier's turn on along with the tape recorder, is usually blue with a white stripe.
It is important to properly configure crossovers on the amplifier to cut off excess frequencies. The subwoofer should only reproduce low frequencies, so a filter is installed on it. Low Pass. Incorrect setting can lead to overload of speakers and the appearance of an unpleasant buzz in the cabin.
Set-up of crossovers
For a subwoofer, set the cut at 60-80 Hz. For mid-range speakers in doors, use the 80-100Hz High Pass filter to protect them from overloading with bass.
Polarity Testing and System Testing
After physical connection of all components, it is necessary to test the system. Turn on the tape and signal. Check each channel separately using the balance settings.Balance) and fadera (Fader). If the sound is lost when switching to a specific door, then the connection in this channel is broken.
Pay special attention to checking the phasing of the speakers. If polarity observed incorrectly, the membranes of the speakers will move in opposite directions, which will lead to the quenching of the sound wave. You can check this by turning on a track with a pronounced bass and listening to see if there is a "failure" in low frequencies. You can also use a battery: when connected to the speaker, the membrane should be pushed outwards when the plus comes in contact with the plus.
During the listening process, pay attention to the presence of extraneous noises, background or whistle. Often the source of interference is poor grounding of the tape recorder or guidance signals from power wires. Spread the signal and power cables to different sides of the cabin to minimize the electromagnetic impact.
- 🔊 Check the work of all four channels separately.
- 🔋 Control of voltage at the terminals of the battery during the operation of the system.
- 🎵 Assessing the sound quality at maximum volume without distortion.
- 🖐 Check the heating of the wires and connectors after 10 minutes of operation.
Common Errors and How to Resolve Them
One of the most common mistakes is to ignore the cross-section of wires. A thin wire acts as a resistor, limiting current and taking power away from the speaker. This is especially critical for low-frequency speakers that consume more power. If the sound has become dull, and the wires are very warm, they must be replaced with thicker ones.
Another common problem is poor contact in twisting places or oxidation of terminals. Over time, under the influence of vibration, the connection may weaken, which will lead to the appearance of cod or periodic loss of sound. All connections must be reliably fixed, preferably soldered or connected through terminals.
It is critical to ensure reliable grounding of the tape recorder on the car body. If the mass contact is poor, the amplifier power will be limited, and a strong background will appear in the columns. Clean the contact area to the metal and use the washer bolt for a reliable pin.The sound quality of 80 percent depends on the quality of wires and the reliability of contacts, not just the price of acoustics.
Can I connect 4 speakers to the tape without an amplifier?
Yes, most regular tape recorders have a built-in amplifier designed to work with 4 speakers. The main thing is that the resistance of each speaker meets the requirements (usually 4 ohms), otherwise the amplifier may overheat.
Why are the speakers wheezing at high volume?
Wheezing can be caused by amplifier overload, poor-quality signal source (low MP3 bitrate), damage to the speaker diffuser, or insufficient cross-section of the feed wires.
Do I need a separate fuse for the speakers?
For standard speakers powered by the tape recorder, a separate fuse is not put, they are protected by a common fuse of the head device. For external amplifiers, the installation of a fuse in the rupture of the power wire near the battery is mandatory.
How to determine if the speaker is burned?
Check the resistance of the speakers with a multimeter. If the device shows infinity (break) or zero (short circuit), the speaker is faulty. Also about the breakdown is the absence of sound when the signal is given.