Sound system for vehicle and vehicle

Abstract

The utility model discloses a sound system for a vehicle and the vehicle, and belongs to the technical field of sound. The sound system comprises a multimedia host which comprises an audio signal processor and a built-in power amplifier, and a first audio signal output end of the audio signal processor is connected with a signal input end of the built-in power amplifier; the signal input end of the first external power amplifier is connected with the second audio signal output end of the audio signal processor; the first loudspeaker is connected with the signal output end of the built-in power amplifier; and the second loudspeaker is connected with the signal output end of the first external power amplifier. According to the invention, the high-configuration requirement of the user can be quickly met.

Description

Technical Field

[0001] The present application relates to the field of audio technology, and in particular to an audio system for a vehicle and the vehicle. Background Art

[0002] With the continuous improvement of transportation routes, the number of people using passenger cars for travel is increasing. Since the process of traveling by passenger car is often boring, the demand for in-car audio systems in passenger cars is gradually increasing to make the travel more interesting without affecting driving behavior.

[0003] In the prior art, the audio system for a vehicle is usually a host connected to a power amplifier, which is then connected to a speaker, thereby realizing the transmission and playback of audio signals. However, the above-mentioned audio system for a vehicle has fewer power amplifier channels, that is, the configuration is low, which makes it difficult to meet the user's high configuration requirements for the on-board audio of a passenger car. Based on this, the prior art usually adds a power amplifier unit inside the power amplifier, thereby increasing the power amplifier channels to improve the configuration of the audio system. However, due to the addition of the power amplifier unit inside the power amplifier, the original software code cannot be adapted, and the developer needs to redevelop the software code. The development cycle is long, and it is difficult to quickly meet the user's high configuration requirements. Therefore, the audio system for a vehicle in the prior art has the problem of being difficult to quickly meet the user's high configuration requirements. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a vehicle audio system and a vehicle, so as to solve the problem that the vehicle audio system in the prior art is difficult to quickly meet the high configuration requirements of users.

[0005] In order to achieve the above-mentioned objectives, the first aspect of the present application provides an audio system for a vehicle, the audio system comprising: a multimedia host, including an audio signal processor and a built-in power amplifier, the first audio signal output end of the audio signal processor being connected to the signal input end of the built-in power amplifier, the audio signal processor being used to transmit the first audio signal to the built-in power amplifier, the built-in power amplifier being used to receive and amplify the first audio signal; a first external power amplifier, the signal input end of the first external power amplifier being connected to the second audio signal output end of the audio signal processor, the audio signal processor being used to transmit the second audio signal to the first external power amplifier, the first external power amplifier being used to receive and amplify the second audio signal; a first speaker being connected to the signal output end of the built-in power amplifier, for receiving and playing the first audio signal amplified by the built-in power amplifier; and a second speaker being connected to the signal output end of the first external power amplifier, for receiving and playing the second audio signal amplified by the first external power amplifier.

[0006] In an embodiment of the present application, the audio system also includes: a second external power amplifier, the signal input end of the second external power amplifier is connected to the signal input end of the first external power amplifier, the audio signal processor is used to transmit the second audio signal to the second external power amplifier, and the second external power amplifier is used to receive and amplify the second audio signal; a third speaker is connected to the signal output end of the second external power amplifier, and is used to receive and play the second audio signal amplified by the second external power amplifier.

[0007] In an embodiment of the present application, the audio system also includes: a third external power amplifier, the signal input end of the third external power amplifier is connected to the third audio signal output end of the audio signal processor, the audio signal processor is used to transmit the third audio signal to the third external power amplifier, and the third external power amplifier is used to receive and amplify the third audio signal; a fourth speaker is connected to the signal output end of the third external power amplifier, and is used to receive and play the third audio signal amplified by the third external power amplifier.

[0008] In the embodiment of the present application, the built-in power amplifier, the first external power amplifier, the second external power amplifier, and the third external power amplifier include a boost circuit and a buck circuit.

[0009] In an embodiment of the present application, the first audio signal output terminal of the audio signal processor is connected to the signal input terminal of the built-in power amplifier through an audio bus, the signal input terminal of the first external power amplifier is connected to the second audio signal output terminal of the audio signal processor through the audio bus, the signal input terminal of the second external power amplifier is connected to the signal input terminal of the first external power amplifier through the audio bus, and the signal input terminal of the third external power amplifier is connected to the third audio signal output terminal of the audio signal processor through the audio bus.

[0010] In the embodiment of the present application, the output powers of the multiple power amplification units are different.

[0011] In the embodiment of the present application, the number of the first speaker, the second speaker, the third speaker and the fourth speaker is one or more.

[0012] In the embodiment of the present application, the power of the first speaker is less than the power of the second speaker, the third speaker and the fourth speaker.

[0013] A second aspect of the present application provides a vehicle, comprising: an audio system for a vehicle according to any one of the above items.

[0014] The above technical solution, through a built-in power amplifier connected to the first audio signal output terminal of the audio signal processor in the multimedia host and a first external power amplifier connected to the second audio signal output terminal of the audio signal processor, can receive the first audio signal and the second audio signal transmitted by the audio signal processor in the multimedia host. Then, the first speaker and the second speaker can receive and play the first audio signal and the second audio signal transmitted by the built-in power amplifier and the first external power amplifier. In this way, by placing a power amplifier inside the multimedia host to work together with the first external power amplifier, developers do not need to develop additional software code, greatly shortening the upgrade configuration time, increasing the number of power amplifier channels for the vehicle audio system, and thus improving the configuration of the vehicle audio system, which can quickly meet the high configuration requirements of users.

[0015] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present application but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0017] Figure 1 The figure schematically shows a structural diagram of a vehicle audio system according to an embodiment of the present application;

[0018] Figure 2 Schematically shows a structural diagram of a vehicle audio system according to another embodiment of the present application;

[0019] Figure 3 The figure schematically shows a structural diagram of a vehicle audio system according to another embodiment of the present application.

[0020] Description of Reference Numerals

[0021] 101 Multimedia Host 111 Audio Signal Processor

[0022] 201 First external power amplifier 121 Built-in power amplifier

[0023] 301 first speaker 202 second external power amplifier

[0024] 401 Second speaker 203 Third external power amplifier

[0025] 402 Third speaker 403 Fourth speaker DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0029] Figure 1 The following schematically shows a structural diagram of a vehicle audio system according to an embodiment of the present application. Figure 1As shown, an embodiment of the present application provides an audio system for a vehicle, which may include: a multimedia host 101, which may include an audio signal processor 111 and a built-in power amplifier 121, wherein a first audio signal output terminal of the audio signal processor 111 is connected to a signal input terminal of the built-in power amplifier 121, and the audio signal processor 111 is used to transmit a first audio signal to the built-in power amplifier 121, and the built-in power amplifier 121 is used to receive and amplify the first audio signal; a first external power amplifier 201, wherein a signal input terminal of the first external power amplifier 201 is connected to a second audio signal output terminal of the audio signal processor 111, and the audio signal processor 111 is used to transmit a second audio signal to the first external power amplifier 201, and the first external power amplifier 201 is used to receive and amplify the second audio signal; a first speaker 301, connected to the signal output terminal of the built-in power amplifier 121, and configured to receive and play the first audio signal amplified by the built-in power amplifier 121; and a second speaker 401, connected to the signal output terminal of the first external power amplifier 201, and configured to receive and play the second audio signal amplified by the first external power amplifier 201.

[0030] It can be understood that the audio signal processor 111 may include a first audio signal output terminal and a second audio signal output terminal. The first audio signal output terminal is used to connect to the signal input terminal of the built-in power amplifier 121 and output the first audio signal. The second audio signal output terminal is used to connect to the signal input terminal of the first external power amplifier 201 and output the second audio signal. The built-in power amplifier 121 is a power amplifier arranged inside the multimedia host 101 and connected to the first signal output terminal of the audio signal processor 111 inside the multimedia host 101. The first external power amplifier 201 is a power amplifier placed outside the multimedia host 101 and connected to the external connection port of the multimedia host 101. The first audio signal and the second audio signal are audio signals transmitted by the audio signal processor and are transmitted to the built-in power amplifier 121 and the first external power amplifier 201 respectively. The first speaker 301 and the second speaker 401 can be connected to the signal output terminals of the built-in power amplifier 121 and the first external power amplifier 201 respectively via hard wires. The number of the first speaker 301 can be one or more, and the number of the second speaker 401 can be one or more.

[0031] Specifically, the multimedia host 101 can include a built-in power amplifier 121 for receiving and amplifying a first audio signal transmitted by an audio signal processor 111 in the multimedia host 101, and then the built-in power amplifier 121 can transmit the first audio signal to a first speaker 301, which receives and plays the first audio signal. Meanwhile, the sound system can include a first external power amplifier 201 in addition to the built-in power amplifier 121 in the multimedia host 101, for receiving and amplifying a second audio signal transmitted by the audio signal processor 111, and then the first external power amplifier 201 can transmit the first audio signal to a second speaker 401, which receives and plays the first audio signal. Thus, since the built-in power amplifier 121 can support a number of 3-7 channels (at least 3 channels and at most 7 channels), and the first external power amplifier can support a number of 8 channels, the total number of power amplifier channels can be increased to 11-15 (at least 11 channels and at most 15 channels) through the cooperation of the built-in power amplifier 121 and the first external power amplifier. Understandably, the processing of all audio signals by the audio signal processor 111 is a conventional audio signal processing method, which will not be described in detail here. The processing of corresponding audio signals by the built-in power amplifier 121 and the first external power amplifier 201 is also a conventional signal processing process, which will not be described in detail here.

[0032] The above sound system for a vehicle can receive first and second audio signals transmitted by an audio signal processor 111 in a multimedia host 101 through a built-in power amplifier 121 connected to a first audio signal output end of the audio signal processor 111 in the multimedia host 101, and a first external power amplifier 201 connected to a second audio signal output end of the audio signal processor 111, and then first and second speakers can receive and play the first and second audio signals transmitted by the built-in power amplifier 121 and the first external power amplifier 201. Thus, placing a power amplifier inside the multimedia host and cooperating with the first external power amplifier does not require developers to develop additional software code, greatly shortens the time for upgrading the configuration, increases the number of power amplifier channels of the sound system for a vehicle, and thus improves the configuration of the sound system, which can quickly meet the high-configuration needs of users.

[0033] In one embodiment, as Figure 2As shown, the audio system for the vehicle can further include: a second external power amplifier 202, a signal input end of the second external power amplifier 202 being connected with the signal input end of the first external power amplifier 201, the audio signal processor 111 being configured to transmit a second audio signal to the second external power amplifier 202, and the second external power amplifier 202 being configured to receive and amplify the second audio signal.

[0034] It can be understood that the second external power amplifier 202 is a power amplifier which is located outside the multimedia host 101 and connected with the external connection port of the multimedia host 101, and the third speaker 402 can be connected with the signal output end of the second external power amplifier 202 through a hard wire.

[0035] Specifically, the second external power amplifier 202 receives and amplifies the second audio signal transmitted by the audio signal processor 111, and then transmits the second audio signal to the third speaker 402, and the third speaker 402 receives the second audio signal and plays it. Figure 1 On the basis of the above, one second external power amplifier 202 is added, and one second external power amplifier 202 can also support 8 power amplifier channels, so that under the action of one built-in power amplifier (the built-in power amplifier 121) and two external power amplifiers (the first external power amplifier 201 and the second external power amplifier 202), the total number of power amplifier channels can be increased to 23. The processing process of the second external power amplifier 202 on the corresponding audio signal also belongs to a conventional signal processing process, which is not described in detail here.

[0036] In one embodiment, as shown in Figure 3 As shown, the audio system for the vehicle can further include: a third external power amplifier 203, a signal input end of the third external power amplifier 203 being connected with a third audio signal output end of the audio signal processor 111, the audio signal processor 111 being configured to transmit a third audio signal to the third external power amplifier 203, and the third external power amplifier 203 being configured to receive and amplify the third audio signal; and a fourth speaker 403 connected with a signal output end of the third external power amplifier 203, configured to receive and play the third audio signal amplified by the third external power amplifier 203.

[0037] It can be understood that the audio signal processor 111 can also include a third audio signal output terminal, which is used to connect to the signal input terminal of the third external power amplifier 203 and output a third audio signal. The third external power amplifier 203 is a power amplifier placed outside the multimedia host 101 and connected to the external connection port of the multimedia host 101. The fourth speaker 403 can be connected to the signal output terminal of the third external power amplifier 203 via a hard wire.

[0038] Specifically, the third external power amplifier 203 receives and amplifies the third audio signal transmitted by the audio signal processor 111, and then the third external power amplifier 203 transmits the third audio signal to the fourth speaker 403, and the fourth speaker 403 receives and amplifies the third audio signal. Figure 2 On the basis of the first embodiment, a third external power amplifier 203 is added. One third external power amplifier 203 can also support 8 power amplifier channels. In this way, with the help of one internal power amplifier (internal power amplifier 121) and three external power amplifiers (first external power amplifier 201, second external power amplifier 202, and third external power amplifier 203), the total number of power amplifier channels can be increased to 31. The processing process of the corresponding audio signal by the second external power amplifier 202 is also a conventional signal processing process and is not described in detail here. The processing process of the corresponding audio signal by the third external power amplifier 203 is also a conventional signal processing process and is not described in detail here.

[0039] In one embodiment, the internal power amplifier 121 , the first external power amplifier 201 , the second external power amplifier 202 , and the third external power amplifier 203 include a boost circuit and a buck circuit.

[0040] It can be understood that the built-in power amplifier 121 , the first external power amplifier 201 , the second external power amplifier 202 and the third external power amplifier 203 may be power amplifiers located at different positions but with the same structure.

[0041] The boost circuit can increase the voltage of some circuits within the internal power amplifier 121, the first external power amplifier 201, the second external power amplifier 202, and the third external power amplifier 203, thereby facilitating the output of audio signals. The buck circuit can reduce the voltage of some circuits within the internal power amplifier 121, the first external power amplifier 201, the second external power amplifier 202, and the third external power amplifier 203, thereby preventing low-power loads within each power amplifier from malfunctioning due to excessive voltage.

[0042] In one embodiment, the first audio signal output terminal of the audio signal processor 111 is connected to the signal input terminal of the built-in power amplifier 121 via an audio bus, the signal input terminal of the first external power amplifier 201 is connected to the second audio signal output terminal of the audio signal processor 111 via an audio bus, the signal input terminal of the second external power amplifier 202 is connected to the signal input terminal of the first external power amplifier 201 via an audio bus, and the signal input terminal of the third external power amplifier 203 is connected to the third audio signal output terminal of the audio signal processor 111 via an audio bus.

[0043] It can be understood that the audio bus (Automotive Audio Bus, A2B) is a bus connecting the audio signal processor 111 with the built-in power amplifier 121, the first external power amplifier 201, the second external power amplifier 202 and the third external power amplifier 203. In addition, A2B can also connect the signal input end of the second external power amplifier 202 with the signal input end of the first external power amplifier 201 through the audio bus, and can be used to transmit the first audio signal, the second audio signal and the third audio signal output end of the audio signal processor 111. Through A2B, the audio signal can be transmitted to multiple power amplifiers to realize multi-channel transmission of the audio signal.

[0044] In one embodiment, the internal power amplifier, the first external power amplifier, the second external power amplifier, and the third external power amplifier include a plurality of power amplification units.

[0045] The number of power amplification units can be at least two, and the power amplification units can include multiple types of power amplifier chips such as Class A, Class B, Class AB, Class C, and Class D. Multiple power amplification units can be power amplifier chips of the same type or different types.

[0046] Specifically, if the number of power amplification units is two, the types of these two power amplification units can be Class D and Class AB power amplification units respectively, and the connection relationship between the two power amplification units is a series connection. The built-in power amplifier 121, the first external power amplifier 201, the second external power amplifier 202 and the third external power amplifier 203 can each include two power amplification units, and the output ends of the two power amplification units are connected to the signal output end of the built-in power amplifier 121, the signal output end of the first external power amplifier 201, the signal output end of the second external power amplifier 202 and the signal output end of the third external power amplifier 203.

[0047] In one embodiment, the output powers of the multiple power amplification units are different.

[0048] Specifically, multiple different types of power amplification units can be placed inside the built-in power amplifier 121, the first external power amplifier 201, the second external power amplifier 202 and the third external power amplifier 203 of multiple power amplification units. Therefore, the output power of different power amplification units is different, so that they can carry loads of different power to meet different power output requirements.

[0049] In one embodiment, the number of the first speaker 301 , the second speaker 401 , the third speaker 402 and the fourth speaker 403 is one or more.

[0050] It can be understood that the speaker is used to receive and play audio signals.

[0051] Specifically, the first speaker 301 is used to receive and play the first audio signal amplified by the built-in power amplifier 121, the second speaker 401 is used to receive and play the second audio signal amplified by the first external power amplifier 201, the third speaker 402 is used to receive and play the second audio signal amplified by the second external power amplifier 401, and the fourth speaker 403 is used to receive and play the third audio signal amplified by the third external power amplifier 203. The number of the first speaker 301, the second speaker 401, the third speaker 402 and the fourth speaker 403 can be one or more to achieve a stereo surround effect of the audio.

[0052] In one embodiment, the power of the first speaker 301 is smaller than the power of the second speaker 401 , the third speaker 402 , and the fourth speaker 403 .

[0053] Specifically, the first speaker 301 is connected to the signal output end of the built-in power amplifier 121, while the second speaker 401, the third speaker 402, and the fourth speaker 403 are connected to the first external power amplifier 201, the second external power amplifier 202, and the third power amplifier 203, respectively. It can be seen that the built-in power amplifier in the multimedia host 101 can transmit low-power audio signals, while the first external power amplifier 201, the second external power amplifier 202, and the third power amplifier 203 can transmit high-power audio signals. Therefore, the power of the first speaker 301 is less than the power of the second speaker 401, the third speaker 402, and the fourth speaker 403.

[0054] An embodiment of the present application provides a vehicle, comprising: an audio system for a vehicle according to the above embodiment.

[0055] like Figure 3As shown, in one vehicle, the built-in power amplifier 121 in the multimedia host 101, the first external power amplifier 201, the second external power amplifier 202, and the third external power amplifier 203 can be included, on the one hand, due to the small size of the external power amplifier, the external power amplifier can be placed in a distributed manner in the vehicle, specifically, the built-in power amplifier 121 in the multimedia host 101 can be placed in the center console, the first external power amplifier 201, the second external power amplifier 202, and the third external power amplifier 203 can be placed in the center console, under the seat, and in the trunk of the vehicle, respectively, in this way, through the flexible combination of the multimedia host and the plurality of external power amplifiers (for example, the first external power amplifier 201, the second external power amplifier 202, and the third external power amplifier 203), a plurality of configurations of the sound system for the vehicle can be covered, thereby improving the flexibility of placement in the vehicle.

[0056] On the other hand, the built-in power amplifier 121 in the multimedia host 101 and the first external power amplifier 201 connected to the first speaker 301 and the second speaker 401 through a hard line can be placed in the front part (for example, the left front door, the right front door, and the center console) of the vehicle, the second external power amplifier 202 and the third external power amplifier 203 connected to the third speaker 402 and the fourth speaker 403 through a hard line can be placed in the middle part (for example, the headrest of the driver's seat, the headrest of the front passenger's seat, and the top of the vehicle) and the rear part (for example, the left rear door and the right rear door) of the vehicle, respectively, which can reduce the length of the connection line between the power amplifier and the speaker, reduce the line loss of the audio signal in the transmission process, and reduce the cost of the wire harness, in addition, the sound can be concentrated in the vehicle, and the playing effect of the speaker can be improved.

[0057] In summary, the built-in power amplifier 121 connected to the first audio signal output end of the audio signal processor 111 in the multimedia host 101 and the first external power amplifier 201 connected to the second audio signal output end of the audio signal processor 111 can receive the first audio signal and the second audio signal transmitted by the audio signal processor 111 in the multimedia host 101, and then the first speaker 301 and the second speaker 401 can receive the first audio signal and the second audio signal transmitted by the built-in power amplifier 121 and the first external power amplifier 201 and play, in this way, one power amplifier is placed in the multimedia host, which can increase the number of power amplifier channels of the sound system for the vehicle, at the same time, the developer does not need to develop software code again, which greatly shortens the time of upgrading the configuration, improves the configuration of the sound system, and greatly enhances the adaptation ability of the sound system, further, the sound system for the vehicle of the present application can quickly meet the high configuration demand of the user, and improve the user experience.

[0058] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0059] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A sound system for a vehicle, characterized in that The sound system comprises: A multimedia host, comprising an audio signal processor and a built-in power amplifier, wherein a first audio signal output terminal of the audio signal processor is connected to a signal input terminal of the built-in power amplifier, the audio signal processor is configured to transmit a first audio signal to the built-in power amplifier, and the built-in power amplifier is configured to receive and amplify the first audio signal; a first external power amplifier, wherein a signal input terminal of the first external power amplifier is connected to a second audio signal output terminal of the audio signal processor, the audio signal processor is configured to transmit a second audio signal to the first external power amplifier, and the first external power amplifier is configured to receive and amplify the second audio signal; a first speaker connected to the signal output terminal of the built-in power amplifier, configured to receive and play the first audio signal amplified by the built-in power amplifier; The second speaker is connected to the signal output end of the first external power amplifier and is used to receive and play the second audio signal amplified by the first external power amplifier.

2. The sound system according to claim 1, wherein The audio system further comprises: a second external power amplifier, wherein a signal input terminal of the second external power amplifier is connected to a signal input terminal of the first external power amplifier, the audio signal processor is configured to transmit the second audio signal to the second external power amplifier, and the second external power amplifier is configured to receive and amplify the second audio signal; The third speaker is connected to the signal output end of the second external power amplifier and is used to receive and play the second audio signal amplified by the second external power amplifier.

3. The sound system according to claim 2, wherein The audio system further comprises: a third external power amplifier, wherein a signal input terminal of the third external power amplifier is connected to a third audio signal output terminal of the audio signal processor, the audio signal processor is configured to transmit a third audio signal to the third external power amplifier, and the third external power amplifier is configured to receive and amplify the third audio signal; The fourth speaker is connected to the signal output end of the third external power amplifier and is used to receive and play the third audio signal amplified by the third external power amplifier.

4. The sound system according to claim 3, wherein The built-in power amplifier, the first external power amplifier, the second external power amplifier and the third external power amplifier include a boost circuit and a buck circuit.

5. The sound system according to claim 3, wherein The first audio signal output terminal of the audio signal processor is connected to the signal input terminal of the built-in power amplifier via an audio bus, the signal input terminal of the first external power amplifier is connected to the second audio signal output terminal of the audio signal processor via an audio bus, the signal input terminal of the second external power amplifier is connected to the signal input terminal of the first external power amplifier via an audio bus, and the signal input terminal of the third external power amplifier is connected to the third audio signal output terminal of the audio signal processor via an audio bus.

6. The sound system according to claim 3, wherein The built-in power amplifier, the first external power amplifier, the second external power amplifier, and the third external power amplifier include a plurality of power amplification units.

7. The sound system according to claim 6, wherein The output powers of the multiple power amplifying units are different.

8. The sound system according to claim 3, wherein The number of the first speaker, the second speaker, the third speaker, and the fourth speaker is one or more.

9. The sound system according to claim 3, wherein The power of the first speaker is smaller than the power of the second speaker, the third speaker, and the fourth speaker.

10. A vehicle, characterized in that: include: A vehicle audio system according to any one of claims 1 to 9.

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