Whether the car power amplifier can be bridged, and how to bridge the professional power amplifier

Not necessarily. First of all, it is necessary to determine how many ohms the load of the power amplifier design, secondly, to determine whether there is inverting conversion in the pre-amp, and to consider whether the input power supply current is enough.

It is a fallacy that the car power amplifier is bridged upstairs, and the power supply of the car power amplifier is low (the standard only uses 12V and 24V), but there are transformer boosts, and there is a switching power supply as soon as you go in.

There are two types of car power amplifier bridging, one is channel bridging; There is also a bridge between two amplifiers.

If it is a two-channel bridge, it means that the output of the two channels is connected to the speaker or speaker. For example, it is a two-channel power amplifier, and there are four interfaces in the terminal block: L+, L-, R+, and R-, and L+ and R- are connected to the positive and negative of the speaker respectively, so that it becomes a bridge. Some amplifiers will be marked with bri on the panel, which is the abbreviation of bridge.

It should be noted that the impedance of the speaker should not be less than 4 ohms. In addition, the power will increase after bridging, so the power of the speaker should be paid attention to, otherwise it will burn out. For specific precautions, please refer to the manual.

Bridging two amplifiers usually occurs in the amplifier of the subwoofer: two identical amplifiers are bridged to push the speaker in order to increase the power, and the amplifier can output 1 times more power. Connection:

Set one of the amplifiers as the primary amplifier and the other as the secondary amplifier. The signal is connected to the main power amplifier, and the setting of the power amplifier function is also controlled by the main power amplifier. The output of the main amplifier is connected to the positive of the horn, and the output of the sub-amplifier is connected to the negative of the horn.

Connect the negative of the main amplifier output with the negative of the sub-amplifier output. In this way, the two amplifiers are bridged. For details, please refer to the manual.

Bridging is a connection method for power amplifiers in the professional audio field - bridging mode.

To put it simply, an amplifier bridging is to push a set of loads (speakers or speaker systems) at the output of two amplification lines at the same time. Boost the audio of the amplifier without distortion output voltage value, thereby increasing the power.

The audio waveforms from the two amplified line outputs are inverted when bridged and are simultaneously loaded on the speakers, so that the load has twice the audio voltage and thus a quadruple increase in power (if the ideal current is sufficient and the load impedance is consistent). However, due to power limitations, the current cannot keep up, so the bridge is often not suitable for impedances below 8 ohms, so the output power is generally doubled. )

Most of the professional performances, KTVs and other power amplifiers support bridge mode, dial the status of the power amplifier to the bridge mode (BTL), the speaker does not need to be grounded (black negative terminal empty connection), the speaker wiring is crossed on the two red output stages, and the phase of the red binding post will indicate the phase of the bridge (that is, the positive and negative poles).

The amplifier should be bridged, first of all, the amplifier should support the bridging function. Not all professional amplifiers support the bridging feature.

The power amplifier that can be used for the bridging function will have a set of gear options for working mode adjustment, you can see if there is one, stero: means stereo, usually use this gear, and the two channels can be adjusted separately.

paral: Indicates mono sound, not stereo sound. Some amplifiers only need to adjust the volume of the left channel, and the volume of two channels can be controlled at the same time.

bridge: means bridging, which is to merge two channels together to push a single box.

To achieve the power amplifier bridge, you must first adjust the gear to the bridge gear, and the two-channel power amplifier can only be connected to one speaker. The positive pole of the speaker is connected to the positive pole of the left channel, and the negative pole of the speaker is connected to the positive pole of the right channel, so that the connection method is the bridge method, and the volume control at this time only the volume potentiometer of the left channel works.

After connecting it, it is equivalent to increasing the power a lot to push a speaker.

1: Check 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.

2: 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).

3: Connect a special fuse for power amplifier from the positive pole of the battery, and the wire will be drawn to the +b of the power amplifier after coming out of the pin fuse.

4: Connect the tie near the amplifier (the tie must be stable and solid), and connect the GND of the amplifier.

5: Connect the speaker, depending on what power 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 amplifier is very particular about the opening of the reed bucket, which is just the basic connection, and there are tedious processes such as fuse selection, wiring, signal shielding, capacitance, sound trial, etc., which need to be completed slowly.

Connect the two output red binding posts of the power amplifier to the loudspeaker, but in bridging mode, the output impedance of the amplifier is doubled, and the power is increased by more than 3 times less than 4 times (the theoretical value is 4 times).

The output red and black wiring of the left and right channels of the power amplifier are connected with the red and black binding posts of the left and right speakers respectively, and the audio signals are transmitted from the left and right channel input interfaces of the power amplifier respectively, and the left and right channel potentiometers of the power amplifier are used to control the volume of the left and right channel speakers respectively.

Automobile power discharge bridges are divided into two situations, one is a sonic highway bridge; There are two power discharge bridges.

If two channels are bridged, it means that the output of both channels is connected to one or more speakers. For example, for a two-channel amplifier, there are four interfaces on the terminal: L, L, R, and R.

Connect L and R with the positive and negative poles of the speaker, and you have a bridge. Some amplifiers are marked with "bri", short for bridge, on the panel. Please note that the impedance of the speaker is usually not less than 4 ohms.

Bridging two amplifiers usually occurs in subwoofer amplifiers: bridging two identical amplifiers to push the speaker The purpose of a speaker is to increase the power so that the amplifier can output twice as much power.

First of all, go to the back of the power amplifier and change the toggle switch from studio (stereo) to bridge (bridge mono), and then wiring method: the positive pole of the sound is connected to the positive pole of the left channel of the power amplifier, the negative pole of the sound is connected to the positive pole of the right channel of the power amplifier, and the volume is controlled by the gain knob of the left channel!

Bridge amplifiers have significant advantages over other amplifier types. It is capable of outputting more power, excels in instantaneous dynamic response, and has brighter sound quality without distortion and clarity. In addition, it also has the advantages of lower distortion rate, stronger anti-interference ability, and more stable performance.

As the name suggests, the bridging amplifier is bridged with two power amplifiers, and then the output of the power amplifier is multiplied by bridging after the beat, and the forward signal of one power amplifier is mixed with the reverse signal of the other power amplifier, and its output is the sum of the voltages of the two power amplifiers, which can compensate the output impedance of the power amplifier.

As the name suggests, the bridge amplifier uses two power amplifiers to bridge the empty banquet, and then multiplies the output of the power amplifier through the bridge, and mixes the forward signal of one power amplifier with the reverse signal of another power amplifier, and its output is the sum of the voltages of the two power amplifiers, which can compensate the output impedance of the power amplifier.

It is to push the amplification circuit of two channels to a group of speakers at the same time to increase the audio output voltage value of the amplifier without distortion, so as to increase the power. Most professional audio amplifiers support bridging, dial the state of the amplifier to bridge mode (BTL) and then the speaker wiring is crossed over the output stage (positive) of the two channels, and the speaker is not grounded. As for the phase plus or minus, the amplifier will have a positive and negative pole of BTL.