How to wire the delay line of the car audio amplifier

Whether the main engine of the car is the original model (most of the original models do not have an audio signal output interface, so you need to install one by yourself, or do not change it, and install a high to low as the signal source of the power amplifier in the speaker line.) The modified host generally has an audio output interface, and the signal line is directly connected. Then find a power amplifier control line, the connector of the power amplifier is REM, and it should be positively charged (some hosts have a power amplifier control line, if there is none, connect an ACC at the ignition switch).

Then connect a special fuse for power amplifier from the positive pole of the battery, and the wire will be pulled out of the fuse to the +b of the power amplifier. Next, connect the lap iron near the amplifier (the tie must be stable and solid), and connect the GND of the power amplifier. After these are installed, you can connect the speakers, depending on what kind of amplifier you use, if you have four channels, you can connect four speakers, or two speakers and a woofer.

If there are two channels, connect two speakers or one woofer. In fact, the installation of the power amplifier is very particular, this is only the basic connection, and there are tedious processes such as fuse selection, wiring, signal shielding, capacitance, sound audition, etc., which need to be completed slowly.

Note: 4 groups of 8 wires of 4 speakers, the black edged line in each group of a color is the negative pole of the speaker, you can't make a mistake, otherwise the phase of the audio is wrong, and the speaker volume will cancel each other. In addition, there is a wire that is the antenna plug on the car, which is directly plugged into the antenna hole of the head; The audio input of the subwoofer is connected to the RCA output of the head.

Generally, there are two kinds of lines when wiring, one is red, one is green, but you want the red to the red connection, as well as the live wire and the zero line, the water and fire wire to the live wire to connect the zero line and the zero line, you use which screwdriver to try it, a charge and the electricity connection, if it really doesn't work, you go to the lottery to ask someone to help you pick up a better insurance, because people are specifically to get a car, so it will not be wrong, and it doesn't take a lot of money, ask someone to help.

Wiring method:

In parta, acc, b+, ill are connected to +12v, GND is connected to -12v, and everything else is empty;

In partb, four "4 and 5W" speakers are connected accordingly.

The maximum total power consumption of the measured power supply is about 60W, and the average power is 45W;

The maximum measured power of each speaker is about 5W, and the average power is 4W;

No load (remove the four horns or turn the volume knob to the minimum, i.e. be in a silent state), the power is W.

1. The car power amplifier has split and integrated (subwoofer is common), with 2-way, 4-way, 6-way speaker output, etc.

2. Wiring method: the power supply has three ends, +12V (+24V for large vehicles), the control end (REM), grounding (ground) or lap iron, +12V termination battery positive, control end (REM) is also connected to +12V, that is, it is to start the car before it is turned on, give the power amplifier an on-voltage, and the power amplifier can work, because the power amplifier consumes a lot of power, and it does not work when parking. The horn connection method and signal input are connected according to the convention.

Some use plastic multi-position plugs to plug in, and the wiring position must be clearly distinguished.

3. The subwoofer is connected to the same power supply, and the passive subwoofer can use the split power amplifier bass channel bridging method, and the two speaker wires are connected to the + end of the left and right channels to increase the output power. - The ends are connected, no need to connect.

There are three ends of the power supply, +12V (+24V for large BAI vehicles), the control end (REM), grounding (ground) or lap iron, +12V termination battery positive, control end (REM) is also connected to +12V, that is, it is to start the car before it is turned on, give the power amplifier an on-voltage, and the power amplifier can work.

The red is connected to the positive electrode, the black is connected to the negative electrode, and the yellow is connected to the ACC wire, if it is placed at home, the yellow is directly connected to the positive electrode. Other groups of wires are connected to the horn, such as: brown and white and brown black, yellow and white and yellow and black, and the group wires of the general speaker wire are glued together, regardless of positive and negative.

The original car has a plug, and it corresponds directly to plugging it in, and that's it.

What brand of amplifier is yours, we can't see how your ** can help you.

Black wire negative pole, yellow wire battery +, red wire key switch +, white black and white, gray black and gray for the front and left and right horns, green black and green, purple black and purple for the rear left and right horns, blue for power amplifier control or automatic antenna, others can be connected or not.

It depends on whether you are actively dividing or passively dividing. The spectrum of audio signals is very wide, and it is difficult for a single speaker (also known as speaker) unit to get a complete response to all the signals at all ranges, especially for car speaker units. As a result, there is a two-way speaker system and a three-way speaker system, which are composed of pairs of two (treble + mid-bass) or three (treble + mid-bass) frequency response characteristic units respectively, which restore the audio signal with high fidelity.

Agitation gladen has a very vivid picture.

Passive play" (see the figure above) means that the audio signal must be divided by the divider after being amplified by the power amplifier, and then the corresponding frequency band is assigned to the corresponding speaker unit for sound restoration. In this process, each speaker unit is connected to the corresponding frequency divider as a load, and the effect is largely dependent on the design of the frequency crossover and the characteristics of the speaker unit itself. Of course, the biggest advantage of this kind of play is to get satisfactory results in the most economical way.

The audio signal is divided before entering the power amplifier, and the corresponding signal frequency band is amplified by the power amplifier and directly acts on the corresponding speaker unit for sound restoration. In this process, each speaker unit is connected to each side of the power amplifier output as a load, so that the audio signal is less non-linear distortion components (such as resistors and capacitors) in the distribution process, so that the audio signal loss is reduced and more fidelity.

The biggest advantage of this kind of gameplay is that it improves the analysis of the sound system and shows the details more clearly.

Hope this car audio wiring physical diagram will be helpful to you! The DSP is located between the main unit and the amplifier.

Generally, there is an official wiring diagram, and there is no abbreviation for the interface.

Generally, the official has a wiring diagram, and there is no interface with an abbreviation logo, I can't tell you for a while, just go to the picture, you can take a look, if you don't understand, you can also go to that station to see.

First of all, connect the power supply, the positive electrode should be connected to the battery, B+ is connected to the positive electrode, GND is connected to the negative electrode, the iron can be connected, REM is connected to the key ACC control line!

4 groups of 8 wires of 4 speakers, each group of a color with a black edge of the line is the negative pole of the speaker, can not be mistaken, otherwise the phase of the audio is wrong, the speaker volume will cancel each other. In addition, there is a wire that is the antenna plug on the car, which is directly plugged into the antenna hole of the head; The audio input of the subwoofer is connected to the RCA output of the head.

Yellow - normal fire, is the 12 volt positive electrode of the battery, the line is used for the head to store various setting parameters, that is, to maintain the memory function of the head. Red - connected to the ACC, is the car key control of the 12 volt cathode, only the car key ignition, 12 volts to turn on, the head host can start, usually after the parking of the head of the host is not energized. Black - ground wire, connected to the negative pole of the battery.

Blue - this is the antenna control line, connect the key switch acc, after the key is ignited, the host antenna can be started to rise. The rest is the speaker line, gray (right front), white (left front), green (left back), purple (right back) 4 groups of 8 lines of the speaker, each group of a color with a black edge of the line is the negative pole of the speaker, can not be mistaken, otherwise the phase of the audio is wrong, the speaker volume will cancel each other. In addition, there is a wire that is the antenna plug on the car, which is directly plugged into the antenna hole of the head; The audio input of the subwoofer is connected to the RCA output of the head.

If it is a standard passenger car horn wiring, there is a plastic cover of 1t 2t under the right front of the driver's seat, after opening, you will see a rectangular plug with 8 square holes, the plug is 4 holes above, 4 holes below, the first hole above and the first hole below form a group of horn circuits, and so on, which group can be powered on with a dry battery is which horn can be sounded, if your car power amplifier output is standard, then plug it in directly. As for how the power supply is connected, I think you will.

If it's a car; Open the upper cover of the power amplifier, generally there is a picture on the reverse side of the upper cover.

The car audio class has these lines, such as acc to connect the car lighter, that is, the line at the key jack. B+ is the line of the batterygnd。Ground.. rl+,rl-。

International standard specifications wiring distinction:

memory: Memory power input or permanent power supply.

l Front SPK+ front speaker output B+ or +12V positive power.

l front spk—The negative output of the left front speaker.

ACC: +12V power control by key.

R Front SPK+ Right Front Speaker Front-End Output.

remote: Start line output, connect to amplifier or pre-starter.

R Front SPK — Right front speaker negative output.

GND: Grounded, Negatively Charged L Read SPK+ Left Rear Speaker Front-End Output.

aux in: Aux input signal connection l read spk—Negative output of the rear left speaker.

Front Out: R read spk+ right rear speaker front output.

rear out: Rear channel front signal output R Read SPK—Rear right speaker negative output.

cd in cd: signal input.

high pass out: the output of the high signal signal.

low pass out: the output of the low signal signal.

Digital Out: The output of the digital signal.

ant lead: automatic antenna control line.

vedio out: image signal output.

Wiring method: Start by looking for the power section, and then connect the speaker cord set.

If you want to learn more in-depth knowledge, it will be the best choice for you. It is recommended that you must wire the power supply separately from the battery, and the speaker wire should make the positive and negative poles clear, and do not connect them in reverse, otherwise you will not be able to listen to the reverse phase.

Crossover principle.

From the perspective of circuit structure, the crossover is essentially an LC filter network composed of capacitors and inductance coils, and the tweeter channel is a high-pass filter, which only allows high-frequency signals to pass through and blocks low-frequency signals; The bass channel is the opposite, it only lets the bass pass through and blocks the high-frequency signal; The midrange channel is a bandpass filter, except for the frequency between the two crossover points, one low and one high, the high-frequency component and the low-frequency component will be blocked. In the actual crossover, sometimes an attenuation resistor is added to balance the sensitivity difference between the tweeter and the woofer; In addition, some crossovers are also added to the impedance compensation network composed of resistance and capacitor, the purpose of which is to make the impedance curve of the speaker psychologically flat, so as to facilitate the power amplifier drive.

It is located behind the power amplifier and is arranged in the speaker, and the power audio signal output by the power amplifier is divided into bass, midrange and treble through the LC filtering network, and sent to their respective speakers respectively. The connection is simple, easy to use, but the power consumption, the audio valley, the production of cross distortion, its parameters and the speaker impedance has a direct relationship, and the speaker impedance is a function of frequency, and the nominal value deviates greatly, so the error is also large, is not conducive to adjustment.

The equipment that divides the weak audio signal is located in front of the power amplifier, and then uses its own independent power amplifier to amplify the signal of each audio frequency band, and then sends it to the corresponding speaker unit respectively. Due to the low current, it can be achieved with a small power electronic active filter, which is easier to adjust, reducing power loss and interference between the speaker units. It makes the signal loss small and the sound quality is good.

However, this method requires an independent power amplifier for each channel, which is costly and complex in circuit structure, and is used in professional sound reinforcement systems.

Crossover specifications.

The first one is the crossover point of the crossover, which should go without saying.

The second is the so-called "road" of the divider, that is, the divider can divide the input original signal into several signals of different frequency bands, and what we usually call two-way and three-way is the "road" of the divider.

The third is the "order" of the divider, also known as the "class".

A passive crossover is essentially a composite of several high-pass and low-pass filter circuits, and the number of these filter circuits is the "road" mentioned above. But in each filter circuit, there is a more elaborate design, in other words, in each filter circuit, can be filtered multiple times, the number of filtering, is the "order" of the divider.

The first-order crossover is also the structure of the inductive frequency divider, and each channel in the second-order crossover has been filtered twice, and this "two-order filtering" is the true meaning of "second-order"!

In fact, the term "second-order crossover" is not standardized, because the "order" is not for the entire crossover, but for a certain "road", so the strict term should be "two-way crossover, both high and low frequency use second-order filtering", because although it is rare, the design of second-order filtering is used for high frequency and first-order filtering for low frequency.