Active sound box

Abstract

The utility model discloses an active sound box, which is characterized in that the active sound box comprises a shell, a loudspeaker is arranged in the shell, the loudspeaker is a coaxial loudspeaker, the loudspeaker comprises a high pitch unit and a low pitch unit, and the high pitch unit and the low pitch unit are coaxially arranged. Compared with the prior art, the active sound box effectively eliminates the sound phase difference and ensures the sound quality.

Description

Technical Field

[0001] This utility model relates to the field of speaker technology, and in particular to an active speaker. Background Technology

[0002] The development of active speaker technology has gone through several stages. Initially, it mainly used a combination of passive speakers and independent amplifiers, which required users to have certain equipment matching and tuning skills. Subsequently, in order to meet the needs of professional recording and monitoring, active speakers with built-in amplifiers were introduced to the market, effectively solving the problem of matching amplifiers and speakers.

[0003] There are currently many technical challenges in the field of audio equipment technology. Common problems include the fact that having only one driver unit responsible for both high and low frequencies can easily lead to sound phase distortion and loss of detail, thus affecting sound quality.

[0004] Therefore, existing active speakers need to be improved to solve the above problems. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides an active speaker that effectively eliminates sound phase difference and ensures sound quality.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] An active speaker includes: a housing, a speaker disposed within the housing, the speaker being a coaxial speaker, the speaker including a tweeter and a woofer, the tweeter and the woofer being coaxially arranged.

[0008] Preferably, the loudspeaker further includes a neodymium magnet, and the neodymium magnet, tweeter and woofer are coaxially arranged.

[0009] Preferably, the housing contains a DSP audio processing module and a circuit module, the circuit module containing a digital power amplifier circuit module and a preamplifier circuit module.

[0010] An operation panel is provided on the surface of the housing.

[0011] Preferably, the operation panel is equipped with a Bluetooth antenna, a menu button, an input converter, a computer interface, a volume control, a microphone input interface, a line input interface, a power switch, and a power interface.

[0012] The circuit module is connected to the menu key, input converter, computer interface, volume control, power switch, and power interface.

[0013] Preferably, the digital power amplifier circuit module has D·AMP digital power amplifier circuit technology, and the digital power amplifier circuit module includes an operational amplifier, a power amplifier, and a filter;

[0014] The preamplifier circuit module features MLC preamplifier circuit technology, and the preamplifier circuit includes a line input terminal, a microphone input terminal, and an operational amplifier.

[0015] Preferably, the digital power amplifier circuit module is connected to the speaker, and the Bluetooth antenna, microphone input interface, line input interface and preamplifier circuit are connected.

[0016] Preferably, the operation panel is provided with a display screen and at least one indicator light. The display screen is connected to the audio processing module, and the indicator light is connected to the circuit module.

[0017] Preferably, the indicator light includes a protection indicator light, a limit indicator light, a signal indicator light, and a Bluetooth indicator light.

[0018] Preferably, the microphone input interface and the line input interface are XLR connectors.

[0019] Preferably, the shell is made of birch wood, and the surface of the shell is provided with a waterproof layer.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] It effectively eliminates sound phase difference and ensures sound quality. Attached Figure Description

[0022] Figure 1 This is the front view of the active speaker in this application.

[0023] Figure 2 This is a rear view of the active speaker in this application.

[0024] Figure 3 This is a schematic diagram of the internal structure of the active speaker in this application.

[0025] Figure 4 This is a circuit diagram of the DSP audio processing module of this application.

[0026] Figure 5 This is a circuit diagram of the digital power amplifier circuit module of this application.

[0027] Figure 6 This is a circuit diagram of the preamplifier circuit module of this application. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-6The specific embodiments of this utility model will be further described in detail to make the technical solution of this utility model easier to understand and master.

[0029] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right side", "end", "front", "back", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, unless otherwise specified in this specific embodiment, the connection or fixing method between components can be achieved by bolt fixing, pin fixing, or pin connection commonly used in the prior art. Therefore, it will not be described in detail in this embodiment.

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] like Figures 1-3 As shown, an active speaker includes: a housing 1, with an operation panel on the surface of the housing 1, and a speaker inside the housing 1. The speaker is a CPS coaxial speaker (i.e., the speaker has CPS (Coaxial Point Source) technology). The speaker includes a tweeter 17 and a woofer 16, which are coaxially arranged. Existing speakers only have one full-range unit for playing high and low frequencies, resulting in some distortion. This application, by including both a tweeter and a woofer, differs from the existing system which only has one full-range unit. The tweeter is responsible for playing high frequencies, and the woofer is responsible for playing low frequencies, resulting in clear division of labor and reduced distortion. Furthermore, placing the tweeter and woofer on the same axis ensures synergy, effectively eliminates sound phase differences, guarantees sound quality, and makes the sound layered and three-dimensional.

[0033] In this embodiment, the loudspeaker also includes a neodymium magnet 18, and the neodymium magnet 18, tweeter 17, and woofer 16 are coaxially arranged. The neodymium magnet 18, combined with the strong magnetic field generated by the neodymium magnet material, greatly improves the overall efficiency and sensitivity of the loudspeaker, reproducing rich audio details.

[0034] The housing 1 contains an audio processing module and a circuit module. The circuit module includes a digital power amplifier circuit module and a preamplifier circuit module.

[0035] like Figure 4-6As shown, in this embodiment, the DSP audio processing module is a digital DSP module. The signal is converted from analog signal to digital signal by ADC, and then controlled by the audio processing DSP, serial communication protocol (IIS), network service communication protocol (SPI) and MCU instruction operation program to convert the DAC digital signal into an analog signal for output.

[0036] By incorporating a digital DSP module within the housing 1, which integrates functions such as gain, equalization, compression / limiting, users can precisely adjust audio parameters as needed to create personalized sound effects. At the same time, due to the inclusion of an audio processing module, it integrates multiple functions, ensuring functionality while reducing the installation of many components. Compared to traditional speakers, it can be smaller in size, making it convenient for users to carry and place, and meeting the needs of different occasions.

[0037] In this embodiment, the digital power amplifier circuit module features D·AMP (Class D Amplifier) ​​digital power amplifier circuit technology. The module includes a line input, a microphone input, an operational amplifier, a power amplifier, and a filter. The digital power amplifier circuit is characterized by high efficiency, low heat generation, energy saving, and stable operation over extended periods. It maintains low distortion even at high power output, meeting the sound reinforcement needs of various scenarios. In this embodiment, the filter is an LPF filter.

[0038] The preamplifier module features MLC (Microphone & Line Combined Input) preamplifier technology, comprising a line input, a microphone input, and an operational amplifier. The preamplifier's core objectives are to improve the signal-to-noise ratio, reduce signal distortion, and support flexible signal processing. Its modular design integrates an operational amplifier and a single-ended Class A amplifier, achieving a balance between high input impedance and low distortion, and supporting personalized tone adjustment. Intelligent control integrates volume adjustment, bass and treble equalization, and silent mode detection, significantly enhancing the user experience through digital processing.

[0039] like Figure 2 As shown, the control panel includes a Bluetooth antenna 3, a menu button 11, an input converter 8, a computer interface 12, a volume control 13, a microphone input 14, a line input 15, a power switch 9, and a power interface 10. The circuit module is connected to the menu button 11, input converter 8, computer interface 12, volume control 13, power switch 9, and power interface 10. The digital power amplifier circuit module is connected to the speaker. The Bluetooth antenna 3, microphone input 14, and line input 15 are connected to the preamplifier circuit.

[0040] With Bluetooth antenna 3, it has Bluetooth receiving function and can quickly pair with various Bluetooth devices, freeing users from the constraints of cables and making the usage scenarios more flexible. Combined with the preamplifier circuit, it can reduce signal interference, improve the signal-to-noise ratio, flexibly process various input signals, and ensure a high-quality audio experience under Bluetooth connection; menu button 11 is a menu selection / confirmation button, and input converter 8 is a Bluetooth / LINE input conversion button.

[0041] The control panel includes a display screen 2 and at least one indicator light. The display screen 2 is electrically connected to the audio processing module, and the indicator light is electrically connected to the circuit module. The display screen 2 allows users to easily view audio parameters. In this embodiment, the indicator lights include a protection indicator light 4, a compression indicator light 5, a signal indicator light 6, and a Bluetooth indicator light 7. By setting multiple indicator lights, overload warnings can be provided to protect the speaker; at the same time, multiple indicator lights allow users to better understand the current operating status of the speaker.

[0042] The microphone input interface 14 and the line input interface 15 are XLR connectors, which include an XLR plug and an XLR socket. In this embodiment, the XLR connector is a three-pin XLR connector, the microphone input interface 14 is an XLR socket, and the line input interface 15 is an XLR plug.

[0043] The advantages of using a three-pin type in XLR connectors are as follows:

[0044] 1. By connecting its three pins to ground, hot (positive) and cold (negative) terminals respectively, the audio signal is split into two signals with opposite phases for transmission. At the receiving end, these two signals are superimposed. Since external interference affects both signals equally during transmission, the interference signals cancel each other out during superposition, greatly reducing the impact of external interference on the audio signal and ensuring high-quality signal transmission.

[0045] 2. Compared to unbalanced transmission methods (such as two-pin plugs), the balanced transmission method of three-pin XLR connectors has stronger anti-interference capabilities. Because unbalanced transmission shares the signal and ground wires, external interference can easily affect signal transmission. In contrast, the balanced transmission of XLR connectors splits the signal into positive and negative paths for independent transmission and has independent grounding, which can better resist external electromagnetic interference and ensure the purity of the audio signal.

[0046] 3. The three-core XLR connector is firmly and reliably connected, and is not easy to loosen or fall off, so as to ensure the stability of signal transmission in various usage scenarios for audio equipment that needs to be moved and plugged in frequently.

[0047] The active speaker housing 1 of this application is made of birch wood, which has strong compressive and bending strength, can withstand a certain load, and has excellent acoustic properties. After being optimized by advanced technology, it can stably perform excellent sound in different environments.

[0048] A waterproof layer is provided on the surface of the housing 1. This waterproof layer is a polyurea waterproof coating. Polyurea waterproof coating has excellent waterproof performance and can effectively prevent water penetration. It is especially suitable for outdoor use and other areas that are susceptible to water damage. In addition, polyurea waterproof coating has high elasticity, which can effectively resist structural deformation and displacement and reduce the risk of coating cracking. At the same time, polyurea coating has good UV resistance and can maintain color and gloss for a long time, making it suitable for outdoor applications.

[0049] The main technical effects of this utility model are reflected in the following aspects:

[0050] It effectively eliminates sound phase difference and ensures sound quality.

[0051] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. An active speaker, characterized in that, include: A housing, wherein a speaker is provided inside the housing, the speaker is a coaxial speaker, the speaker includes a tweeter and a woofer, the tweeter and the woofer are coaxially arranged.

2. The active speaker as described in claim 1, characterized in that, The speaker also includes a neodymium magnet, and the neodymium magnet, tweeter and woofer are coaxially arranged.

3. The active speaker as described in claim 1, characterized in that, The housing contains a DSP audio processing module and a circuit module. The circuit module includes a digital power amplifier circuit module and a preamplifier circuit module. An operation panel is provided on the surface of the housing.

4. The active speaker as described in claim 3, characterized in that, The operation panel is equipped with a Bluetooth antenna, a menu button, an input converter, a computer interface, a volume control, a microphone input interface, a line input interface, a power switch, and a power interface. The circuit module is connected to the menu key, input converter, computer interface, volume control, power switch, and power interface.

5. The active speaker as described in claim 4, characterized in that, The digital power amplifier circuit module features D·AMP digital power amplifier circuit technology and includes an operational amplifier, a power amplifier, and a filter. The preamplifier circuit module features MLC preamplifier circuit technology, and the preamplifier circuit includes a line input terminal, a microphone input terminal, and an operational amplifier.

6. The active speaker as described in claim 4, characterized in that, The digital power amplifier circuit module is connected to the speaker, and the Bluetooth antenna, microphone input interface, line input interface and preamplifier circuit are connected.

7. The active speaker as described in claim 4, characterized in that, The operation panel is equipped with a display screen and at least one indicator light. The display screen is connected to the audio processing module, and the indicator light is connected to the circuit module.

8. The active speaker as described in claim 7, characterized in that, The indicator lights include a protection indicator light, a pressure limit indicator light, a signal indicator light, and a Bluetooth indicator light.

9. The active speaker as described in claim 4, characterized in that, The microphone input interface and line input interface are XLR connectors.

10. The active speaker as described in claim 1, characterized in that, The shell is made of birch wood, and the surface of the shell is provided with a waterproof layer.

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