Direct connection of the output contacts of the tape recorder with the terminals of the speakers requires strict adherence to polarity, otherwise you risk burning the amplifier or getting a distorted sound with a failed bass. Error in connecting wires often causes low frequencies to quench each other, creating a "porridge" effect instead of a pure musical signal. Right. switching It not only ensures the sound quality, but also the durability of your vehicle’s acoustic system. Before starting work, you need to make sure that all components are compatible in resistance and power.
The installation process begins with the selection of suitable materials and the preparation of the tool. You will need a set of screwdrivers, a knife to clean the insulation, tape or thermal shrinkage, as well as special acoustic cables. The use of conventional wiring is unacceptable, as it has high resistance and is not designed to transmit high-frequency audio signals. Quality OFC cable (oxygen-free copper) minimizes signal loss and ensures stable operation of the system even at high volume.
⚠️ Attention: Before starting any work with the electrics of the car, be sure to remove the negative terminal from the battery. This will prevent short circuits that could disable the control unit or the tape recorder itself.
Preparation for installation and selection of components
The first step is to determine the installation locations and the type of speakers you plan to mount. Standard dimensions for most cars are 13 cm (5.25 in) or 16 cm (6.5 in), however, some models may have non-standard oval or square seats. If the dimensions of the new speakers do not coincide with the standard holes, you will need to manufacture or purchase special podium And the squirrel rings. This will ensure a rigid fixation and the correct direction of the sound wave.
Particular attention should be paid to the cross-section of the wires. For frontal acoustics with a capacity of up to 60 W per channel, the best choice will be a copper wire with a cross section of 1.5-2.0 mm2. Thinner wires will cause voltage drops and loss of sound dynamics, especially at low frequencies. It is also important to provide protection of wires from rubbing against the metal of the body, using corrugated or special Cambrians in places of passage through door racks.
When choosing speakers, consider their sensitivity and resistance. The standard resistance is 4 ohms, but there are models of 2 ohms and 8 ohms. Connecting speakers with less resistance than the head unit supports will overheat the amplifier of the tape recorder. On the contrary, high resistance will reduce the maximum volume of the system. Always check your technical passport. audio-source before purchasing components.
Connection schemes and connector slinging
The basis of a quality installation is a correct understanding of the connection scheme. Modern cars use standard color marking of wires, adopted by most electronics manufacturers. However, you can’t rely on the color of the insulation alone, as previous owners could make changes to the wiring. The most reliable use of the multimeter for "recollection" of the line and determine the purpose of contacts.
The standard patterning for a 4-channel connection is as follows:
| Canal | Positive wire (+) | Negative wire (-) | Appointment |
|---|---|---|---|
| Front Left (front left) | White (White) | White with Black Stripe (White/Black) | Left door/pillar |
| Front Right (front right) | Gray (Gray) | Grey with Black Stripe (Gray/Black) | Right door/pillar |
| Rear Left (back left) | Green (Green) | Green with Black Stripe (Green/Black) | Left rear shelf/door |
| Rear Right (back right) | Purple (Purple) | Purple with black stripe (Purple/Black) | Right back shelf/door |
If you install a component system with crossovers, the scheme becomes more complicated. The signal from the tape recorder first arrives on the crossover, which shares frequencies, and only then is distributed between the two. woofer And tweet. In this case, it is important not to confuse the inputs and outputs on the frequency divider itself. An incorrect connection can instantly disable a high-frequency speaker.
Features of subwoofer connection
To connect the active subwoofer, a separate power wire from the battery through the fuse will be required, as will the Remote control wire (usually blue with a white stripe) which signals the amplifier to be turned on when the tape recorder is turned on.
Technology of installation in doors and shelves
Installing speakers in doors requires dismantling the door cards. Be careful with plastic clips, use a special remover or a flat screwdriver wrapped in rags so as not to damage the skin. After removing the card, it is necessary to assess the state of the staff place. Often, metal refinement or installation of a parser ring of plywood or plastic is required to align the plane of the speaker.
A critical point is sealing. The car door is not a sealed volume, and sound without proper preparation will go into the inside of the door, creating a hum and losing bass. It is necessary to seal the technological holes in the metal part of the door with vibration insulation material, creating a closed volume for the speaker to work. That's gonna make it a lot better. sound-quality And it'll remove the rattling of plastic.
☑️ Checklist before door assembly
Wires inside the door should be laid away from the mechanisms of windows and locks. Use regular rubber corrugated wires to move from door to body. If there is no regular hole or it is clogged, carefully expand it, but be sure to restore the tightness of the unit, otherwise water will get into the cabin when washing or raining.
Connection through amplifier and crossover
To unlock the potential of good acoustics, the standard power of the tapes is often not enough. In such cases, an external amplifier is used. Connection requires laying a separate power cable from the battery plus terminal through a fuse installed no further than 30 cm from the battery. The mass of the amplifier should be connected to the car body by a short wire of the same cross section as the power plus, in a place cleaned to metal.
The signal to the amplifier can be transmitted in two ways: by linear output (RCA) or by high-level input (High Level). Linear output provides the best sound quality, as the signal comes with minimal distortion immediately from the head unit. If there are no “linears” on the tape, use a high-level input, connecting signal wires directly to the outputs on the speakers of the tape. Modern amplifiers often know how to convert high to low.
⚠️ Attention: Never connect the negative wires of the speakers with the body of the car ("to the mass"). In automotive acoustics, a bridge connection circuit is used, where both wires are energized relative to the ground. Closing any of the wires on the body will cause the output cascade of the tape recorder or amplifier to burn.
Setting up crossovers is the final stage of building a system. The subwoofer usually displays a cut-off frequency (Low Pass Filter) in the region of 60–80 Hz, cutting off medium and high frequencies. For midbass speakers, High Pass Filter is set at the same frequency to protect them from overloading with low frequencies. Twitter only works without crossovers if they are already built into a component system, otherwise they also need filtering.
Elimination of interference and background in acoustics
A frequent problem after installing a new acoustics is the appearance of extraneous noise: whistle, cod or hum, changing with engine speed. This effect is called the “background generator”. The main reason is tips on signal wires from the power wiring or poor grounding of the head device. To fix the problem, check the reliability of the contact of the mass of the tape recorder with the body.
If the mass is fine, try disconnecting the antenna cable from the tape. If the background is gone, then the problem is in the antenna amplifier or cable. In this case, it will help to install a filter-loop on the antenna wire. It is also often helpful to lay signal cables (RCA) on the opposite side of the cabin from the power wires to minimize electromagnetic induction.
Use interblock cables with shielding and twisted pair inside. This significantly reduces the system's susceptibility to external tips and removes high-frequency whistles.
In complex cases, when the background is caused by a potential difference between the components of the system, it may be necessary to install a ground loop isolator in the break of the signal cable. However, this is an extreme measure, and first you need to eliminate the root cause: check the generator, the ignition system and the quality of all connections.
System check and initial setup
After the installation is completed and before the final assembly of the cabin, it is necessary to test the system. Turn on the tape recorder and check the operation of each channel separately. Make sure all speakers are working in phase. To check the phasing, use a special track or just give a low-frequency signal: if the bass became quieter when both channels were turned on, then one of the speakers is connected incorrectly (inverted in phase).
Adjust balance and fader (the distribution of sound between the front/back and left/right) according to your position in the cabin. Modern radios also allow you to adjust the equalizer. Do not abuse the rise of low frequencies (Bass) at maximum, if you do not have a subwoofer installed - this can lead to mechanical damage to the diffutors of the standard speakers.
The main criterion for correct installation is the absence of extraneous noise at idling and a clean, detailed sound at maximum volume without wheezing and distortion.
The final touch will be the installation of protective nets and a neat assembly of the skin. Make sure that the wires are not clamped anywhere by plastic panels. Properly installed and connected acoustics will last for many years, delighting with high-quality sound in any road conditions.
Can I connect the speakers directly to the battery?
No, you can not connect the speakers directly to the battery. They need an audio signal that forms a magnetol or amplifier. A direct connection to 12 volts will instantly burn the speaker coil. Only the amplifier power is connected to the battery through the fuse.
Why do the speakers wheez at high volume?
Wheezing can be caused by several reasons: overloading the speaker power (lack of watts), mechanical restriction of the diffuser, failure of wire insulation or poor-quality signal source (compressed MP3). Also, the reason may be incorrect setting of the equalizer with excessive bass lifting.
Do I need a safety lock when connecting the speakers?
On the wires of the speakers fuses are rarely put, as they are located close to the tape recorder. However, the power wire running from the battery to the amplifier must have a fuse installed in the immediate vicinity of the battery terminal (not more than 30 cm). It's a fire safety requirement.
How to determine the polarity of speakers without labeling?
Use a regular finger battery (1.5V). Shortly touch the wires from the battery contacts speaker. If the diffuser dynamics moved outwards - the polarity is correct (plus to plus). If you get in, the polarity is reversed. Be careful not to hold for long so as not to burn the coil.