Introduction to the modification of off-road vehicles for car audio modification

For an enthusiast who has never been in contact with off-road vehicles or does not know much about off-road vehicles, you may wish to adopt a gradual upgrade strategy. This will not only prevent your first investment from being too large, but also slowly feel the sound performance The more important thing is that you can learn a lot of relevant knowledge and have fun. In this process, you can understand every link in the modification process, understand what kind of sound changes a certain piece of equipment will make, and its importance; then according to personal pursuit of music taste, you can find yourself from many equipment The sound effect you want to get is either delicate, vivid, or deep and honest...

　Choosing the most important CD host

The host of the original car is only aimed at meeting the basic needs of ordinary consumers, so no matter the appearance or performance, it can't achieve the effect of an open-air concert at all.So, the first thing to modify is the original audio source, that is, the CD source widely used in cars now, whether it is a single-disc CD player or a multi-disc CD player, it is important to see if they have "signal output" RCA coaxialTerminal, It is like the kind of terminal connected to the VCD player at the back of the home TV. If there is no terminal, it is impossible to install an upgraded power amplifier, audio signal processor andEqualizerWait, then you need to reinstall a CD host.

Modified consoles sold on the market will have two or three sets of output terminals. Here, it is recommended that you fully consider your needs when buying: If you install a CD host with a multi-disc box, you will have more The operation of the disc box is convenient, but the sound quality is not as good as the single disc drive. Another aspect should be considered. Off-road vehicles sometimes drive on uneven roads. Although many multi-disc boxes are currently installed with anti-vibration functions, the effect is Not as good as a single disc player. If you want to pursue good sound quality and are not afraid of the trouble of changing discs, simply choose a better model CD host.

Many of the original car's audio system does not have a power amplifier, and they use the power of the host to directly drive the speaker. Therefore, in addition to the RCA output when choosing a CD host, you must also choose a host with a built-in power amplifier, and try to choose a host with a larger power. The power output above 40W is the best. Even if the speaker is not replaced after the host is changed, the increase in the power output value will make the original speaker a lot more vivid. There is also a host that does not have a built-in power amplifier, commonly known as "dumb host". This kind of host is a professional choice for advanced audio enthusiasts. This technology is to minimize the interference caused by the circuit. The host just reads Sound source, to dedicate better music quality and achieve more perfect music effects.Like the world famouscarThe host of the brand "Alpine" CDA-7998R, is the most outstanding representative of this host.

After the power of the host is increased, the original speakers will be unable to withstand strong bass and dynamic music, because they generally have low power and poor sound quality, so choosing to install a better quality speaker becomes the next step. .

　　Speaker directly affects sound quality

The tweeter (or super tweeter) is designed in the center of the mid-bass unit and constitutes a "coaxial" horn standing up on an axis. It is quite common in the above, and many original horns or modified low-cost horns are This kind of. It is low-cost and easy to drive. Although the positioning and tone of the audio are mostly not top-notch, it is also a low-cost choice for the host to promote music.

Each sound range is designed separately, and the crossover is used as a split package speaker for frequency setting, which has become the mainstream of speakers in recent years. The sound quality of this design is generally good, and the installation position of the tweeter can be adjusted according to different vehicles. It’s easier to get a good sound field positioning effect, but the price is relatively expensive.

The loudspeaker is the final stage of showing the entire system. It is a tool to turn the signal into sound. Naturally, the quality of the loudspeaker directly affects the sound quality. Therefore, I think it is better not to save too much budget for the loudspeaker, instead of picking two groups. Ordinary speakers, it is better to choose a better set of speakers installed in the front sound field closer to you. Don’t doubt! The sound of the horn is not obvious from the outside, so you have to listen more and compare more before you decide. In short, "Use your ears and your existing music literacy to feel, experience with your heart, and accept with your heart." !" When choosing a speaker, it is best not to use a paper cone speaker, which can play a better waterproof role.

　　Subwoofer brings shocking performance

When the sound source part has been improved and an ideal speaker is selected, you will find that the performance in the low range is still not ideal, even if you increase the bass (BASS) on the main unit or press the (Loud) gain function, You will find that even though the bass is strengthened, the sound quality has deteriorated. Imagine if you have to force a child to hold a heavy object that an adult can handle, or take a small horse-drawn cart, whether there is any "sequelae" or not, you will feel deeply.

The size of the horn determines the frequency. This is a physical phenomenon that cannot be changed. If you want to obtain a natural and vivid bass performance, changing to a large-diameter woofer becomes the third step of modification. The larger the speaker, the more power is required. The bass sound field is not the power output by the host can be pushed and pushed well. In this case, you must choose a suitable power amplifier for the woofer. Because the installation volume of the woofer is relatively large, it usually has to be placed in the trunk of the car. There are two installation methods, using hoisting or using speakers. The use of hoisting will not take up more space. If you install speakers, the bass will be stronger, efficient and save power. When you choose speakers, pay attention to the size of the speakers, the degree of sealing, etc., which will directly affect the best low-frequency effect , It depends on each person's hobbies how to choose.

　　Power amplifier provides sufficient power

After the above-mentioned gradual upgrade of the system, not only the operating functions are complete, and the sound quality is improved, but the frequency response range is also quite large. If you like this kind of sound performance, you can stop here, but slowly you will find that the sound speed feels a bit slow , The range of the sound field will not be very wide, and there is still a little more than enough for the performance of large dynamic music in the middle and low frequency. Although you have changed a loudspeaker with a higher power, the power it requires is also higher. If you only use the main unit to push them, there will definitely be insufficient power, so installing a power amplifier for the set of speakers is the next step. A step-by-step priority improvement plan.

Power amplifier, the most advanced power amplifier circuit board at present uses computer surface adhesive welding technology, and electronic components are selected micro or integrated components. Regardless of the power output value, timbre, dynamics, and current drive capability, it will be much better than the host. There are many power amplifier brands on the market. When choosing a power amplifier, you must first consider whether it can work continuously under high temperature conditions. Because the power amplifier has a certain volume, most of them are placed in the trunk of the car with ventilation. If it is not good, it will affect the heat dissipation. In summer, the temperature of the trunk is about 80 degrees Celsius. Under such harsh conditions, it is imperative to choose a good power amplifier. In addition, consider whether the power output of each channel matches the speaker you choose. For example, if the rated power of the speaker is 50W, then the selected power amplifier should be 50W-100W (this refers to the output power of each channel). ). Here is one thing to add, you must be cautious when choosing a power amplifier for the woofer. It is necessary to see the technical parameters of the power amplifier and the maximum power of the bridge. For example, if the rated power of the woofer is 200W, then the bridge power of the power amplifier should be 200W-400W. Most suitable. The power of some power amplifiers is very large, but there is no standard, so don't be afraid of trouble and make a clear comparison before making a decision.If you need to install more than two to three power amplifiers according to your needs, it is necessary to consider installing a second storage battery or installingcapacitance, But the price of the capacitor is more expensive. ?

　　The audio cable can not be ignored

After installing the power amplifier, you will find that the sound field has widened, and the dynamics of the sound have been significantly improved. For those music with more bass, the low-frequency speed will also increase a lot. This is entirely due to the power increase of the amplifier. . The power output is like the horsepower of a car. car engine,Dynamo,motor, Chargers, etc. will produce a variety of different noises, and the use of 12V low voltage, to generate large power, the design in the power amplifier must use boostInverterThe way to raise 12V to 30V-50V, KICDER's power amplifier can even reach 100V. In the process of voltage increase, the power amplifier requires a larger current. Therefore, the power cord is particularly important, and audio signal cables, capacitors and other equipment should not be sloppy. The cost should account for about 10% to 20% of the entire audio system.

There is a big difference between off-road vehicle audio and home audio. Home audio is placed in the room. The sound of the horn is reflected and offset is less. The noise generated by the car's own engine and the airflow during driving has the greatest impact on low frequencies. Of, thereforeSoundproofAnd anti-resonance treatment is a key link indispensable for installation. It is not only the selection and matching of equipment, but there are many more...So it is safer to find a professional off-road vehicle audio installation shop, otherwise the installation and handling of the problem will bring danger to your entire car circuit system.

The above is a method of "gradual upgrade" of off-road vehicle audio. With these preparations, a real open-air concert can begin.