Four-channel power amplifier

Abstract

The utility model relates to a four-channel power amplifier. The four-channel power amplifier comprises a case, a front panel, a rear panel and a control circuit, the front panel is arranged at the front part of the case and is used for controlling the startup and shutdown of the whole machine, indicating the working state and ventilating at the same time; the rear panel is arranged at the rear part of the case, a power interface area, a four-channel power amplification area and a fan area are arranged on the rear panel, and the power interface area is used for accessing a power supply; the four-channel power amplification area is provided with four signal input and power output channels which are completely independent, and the four signal input and power output channels are respectively used for being connected with corresponding equipment to carry out power amplification on input signals; the fan area is used for cooling the machine; and the control circuit is arranged in the case and is respectively connected with corresponding interfaces of the front panel and the rear panel. The utility model can be widely applied to the field of network digital equipment.

Description

Technical Field

[0001] This utility model relates to a four-channel power amplifier, belonging to the field of digital network equipment. Background Technology

[0002] In modern communication systems, signal amplification is often necessary to transmit electrical signals over long distances and ensure signal quality. Power amplifiers are an important tool in this regard, effectively transforming weak signals into powerful output signals by increasing their power. In the audio field, power amplifiers amplify audio signals, enabling them to drive devices such as speakers, thereby achieving high-quality music playback and sound effects.

[0003] However, currently, most power amplifiers used are single-channel and dual-channel, whose output power and sound quality are limited by hardware, resulting in very limited output capability, sound quality, and expandability. Furthermore, when using multiple line connections, dual-channel power amplifiers may not be able to completely isolate the various audio signals they process, leading to interference and problems such as noise and sound interference. Summary of the Invention

[0004] To address the aforementioned issues, the purpose of this invention is to provide a four-channel power amplifier that, while ensuring multi-channel power amplification, offers higher output power and sound fidelity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A four-channel power amplifier, comprising:

[0007] Chassis, front panel, rear panel, and control circuitry;

[0008] The front panel is located at the front of the chassis and is used to control the power on / off of the entire machine, indicate its working status, and provide ventilation.

[0009] The rear panel is located at the rear of the chassis and includes a power interface area, a four-channel power amplification area, and a fan area. The power interface area is used to connect to a power source. The four-channel power amplification area has four completely independent signal input and power output channels, which are used to connect to corresponding devices to amplify the input signals. The fan area is used to cool the unit.

[0010] The control circuit is located inside the chassis and is connected to the corresponding interfaces on the front and rear panels, respectively.

[0011] Furthermore, the power interface area is provided with an AC power input socket, an AC power input fuse box, and a DC power input socket;

[0012] The AC power input socket is used to connect to 220V AC power;

[0013] The AC power input fuse box is used as an overcurrent protection switch.

[0014] The DC power input port is used to connect a 48V DC power supply, and the current requirement is above 25A.

[0015] Furthermore, when the DC power input socket is connected to a 48V DC power supply, the wiring method for the small square power input socket is as follows: the 1+ and 2+ ports are connected to the positive terminal of the 48V DC power supply, and the 1- and 2- ports are connected to the negative terminal of the 48V DC power supply.

[0016] Furthermore, each of the aforementioned signal input and power output channels is equipped with a power output interface, a signal input interface, a volume control knob, a bass control knob, and a treble control knob;

[0017] The power output interface is used to output power to the corresponding device;

[0018] The signal input interface is used to receive input signals;

[0019] The volume control knob is used to control the magnitude of the output power amplifier signal;

[0020] The bass control knob is used to adjust the output signal within a preset range when the input signal of the power amplifier is 100Hz.

[0021] The treble control knob is used to adjust the output power within a preset range when the input signal of the power amplifier is 10kHz.

[0022] Furthermore, the fan area is equipped with a fan, and adopts an automatic continuously variable speed air-cooled working mode.

[0023] Furthermore, the front panel is provided with a ventilation area, an indicator light area, and a power control area;

[0024] The ventilation zones are located on the upper and lower sides of the front panel to achieve ventilation for the entire unit;

[0025] The indicator area includes four sets of indicator lights, which are used to indicate the output signal strength and working status of each signal input and power output channel;

[0026] The power control area is used to control the power on / off of the entire machine and to display the power on / off status.

[0027] Furthermore, each group of indicator lights is equipped with a signal indicator light, a peak reduction indicator light, and a protection indicator light;

[0028] The signal indicator light is used to flash intermittently or continuously after an input signal is input and the volume knob is turned on, to indicate that an input signal is present in the power amplifier;

[0029] The peak reduction indicator light is used to indicate that the output of the whole machine has been clipped, and at the same time indicates that the clipping distortion limiting circuit of the machine has started to work.

[0030] The protection indicator light is used to indicate that the whole machine has entered the protection state.

[0031] Furthermore, the power control area includes a power indicator light and a power switch;

[0032] The power indicator light is used to indicate whether the power connection of the power amplifier is intact. If it is lit, it indicates that the power connection of the power amplifier is intact and the power switch is in the on state.

[0033] The power switch is used to control the power amplifier's on / off state.

[0034] Furthermore, the chassis adopts a 2U standard chassis design with a chassis thickness of 6mm; the front and rear panels are made of 2U aluminum alloy panels.

[0035] Due to the adoption of the above technical solutions, this utility model has the following advantages: Compared with single-channel and dual-channel power amplifiers, the four-channel power amplifier proposed in this utility model has higher output power and sound fidelity, adaptability and scalability, better sound dispersion and stereo effect, and is easier to install and debug.

[0036] Therefore, this invention can be widely applied in the field of digital network equipment. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts. In the drawings:

[0038] Figure 1 This is a schematic diagram of the rear panel of the four-channel power amplifier provided in this embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the front panel of the four-channel power amplifier provided in this embodiment of the present invention;

[0040] Figure 3 This is the constant resistance operating mode provided in the embodiments of this utility model;

[0041] Figure 4 This is the constant pressure working mode provided in the embodiments of this utility model;

[0042] Figure 5 This is a system connection diagram provided in the embodiments of this utility model. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] This invention provides a four-channel power amplifier, comprising: a chassis, a front panel, a rear panel, and a control circuit. The rear panel houses a four-channel power amplification area, forming four completely independent signal input and power output channels. Each channel allows independent adjustment of volume and bass / treble, and is equipped with an independent LED level display, providing real-time feedback on output signal strength and various statuses. This invention offers higher output power and sound fidelity, adaptability and scalability, better sound dispersion and stereo imaging, and ease of installation and adjustment.

[0046] Example 1

[0047] like Figures 1-5 As shown, this utility model provides a four-channel power amplifier, which includes: a chassis, a front panel, a rear panel, and a control circuit. The front panel is located at the front of the chassis and is used to control the power on / off of the entire unit, indicate its operating status, and provide ventilation. The rear panel is located at the rear of the chassis and includes a power interface area, a four-channel power amplification area, and a fan area. The power interface area is used to connect to a power source. The four-channel power amplification area has four completely independent signal input and power output channels, each used to connect to corresponding devices and amplify the input signals. The fan area is used to cool the power amplifier. The control circuit is located inside the chassis and is used to connect to the corresponding interfaces on the front and rear panels.

[0048] Furthermore, such as Figure 1As shown, the power interface area includes an AC power input socket 16, an AC power input fuse box 17, and a DC power input socket 18. The AC power input socket 16 is used to connect to 220V AC power; the DC power input socket 18 is used to connect to 48V DC power, with a current requirement of 25A or higher.

[0049] Furthermore, when the DC power input socket 18 is connected to a 48V DC power supply, the wiring method for the small square power input socket is as follows: the 1+ and 2+ ports are connected to the positive terminal of the 48V DC power supply, and the 1- and 2- ports are connected to the negative terminal of the 48V DC power supply.

[0050] Furthermore, the four-channel power amplifier area is equipped with four completely independent signal input and power output channels, each of which can independently adjust volume and bass / treble. Specifically, each channel is equipped with a power output interface, a signal input interface, a volume control knob, a bass control knob, and a treble control knob. The power output interface is used to output power to the corresponding device; the signal input interface is used to receive the input signal; the volume control knob is used to control the output amplifier signal level; the bass control knob is used to adjust the output signal within a preset range (e.g., ±10dB) when the amplifier's input signal is 100Hz; and the treble control knob is used to adjust the output power within a preset range (e.g., ±10dB) when the amplifier's input signal is 10kHz.

[0051] Furthermore, the fan area is equipped with fan 39. To ensure the normal operation of the power amplifier, the fan adopts an advanced automatic stepless speed variable air-cooling mode: during use, the power amplifier should be kept in good ventilation at all times to avoid abnormal temperature rise of the whole machine due to obstructed airflow.

[0052] Furthermore, such as Figure 2 As shown, the front panel includes a ventilation area, an indicator light area, and a power control area. The ventilation area is located on the top and bottom sides of the front panel to provide ventilation for the entire unit; the indicator light area indicates the operating status of the unit; and the power control area displays the power on / off status of the unit.

[0053] Furthermore, the indicator light area includes four sets of indicator lights to indicate the output signal strength and operating status of each channel. Specifically, each set of indicator lights contains a signal indicator, a peak reduction indicator, and a protection indicator. The signal indicator flashes intermittently or continuously after an input signal is received and the volume knob is turned on to indicate the presence of an input signal in the power amplifier. The peak reduction indicator indicates that the output of the power amplifier has been clipped, and also indicates that the clipping distortion limiting circuit of the unit has started working. The protection indicator indicates that the power amplifier has entered the protection state.

[0054] In this embodiment, the distortion reduction circuit ensures high-quality sound reproduction while reducing accidental damage to the speaker caused by clipping waveforms generated by over-driving. The protection indicator light will illuminate for about 5 seconds after each power-on and then automatically turn off. If this light illuminates during normal use, it indicates that the power amplifier has entered a protection state. In this case, the power should be turned off and the fault should be rectified before restarting.

[0055] Furthermore, the power control area includes a power indicator light and a power switch. The power indicator light is used to indicate whether the power connection of the power amplifier is intact. If it is lit, it indicates that the power connection of the power amplifier is intact and the power switch is in the open position. The power switch is used to control the power amplifier to turn on and off.

[0056] Furthermore, the chassis adopts a 2U standard chassis design with a thickness of 6mm; the front and rear panels are made of 2U aluminum alloy panels.

[0057] This utility model can operate in two working modes:

[0058] like Figure 3 As shown, constant impedance operating mode: In constant impedance operating mode, maximum power transfer is achieved by matching the output impedance to the load impedance. In this mode, the amplifier has low output impedance and high output current, suitable for short-distance, high-quality audio transmission, such as in home theaters and concert halls. It focuses more on sound quality and effects, providing a delicate and realistic audio experience. In constant impedance operating mode, it can achieve a constant impedance output of 4 to 16 ohms. For example, a low-impedance speaker can be connected in series or parallel through the 2- and 2+ terminals; therefore, the total impedance is equal to (or greater than) 4 ohms.

[0059] like Figure 4 As shown, the constant voltage operating mode ensures a constant output voltage from the power amplifier, making it suitable for long-distance audio signal transmission and parallel connection of multiple speakers. In this mode, the voltage is stable, the current is low, and line losses are reduced, making it suitable for public address systems, background music systems, etc. In constant voltage operating mode, 100V and 70V constant voltage outputs can be achieved.

[0060] The two operating modes enable the power amplifier provided by this invention to adapt to the needs of broadcasting systems and professional audio systems.

[0061] The technical parameters of this utility model are shown in Table 1 below:

[0062] Table 1 Technical parameters of the four-channel power amplifier

[0063]

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A four-channel power amplifier, characterized in that, include: Chassis, front panel, rear panel, and control circuitry; The front panel is located at the front of the chassis and is used to control the power on / off of the entire machine, indicate its working status, and provide ventilation. The rear panel is located at the rear of the chassis and includes a power interface area, a four-channel power amplification area, and a fan area. The power interface area is used to connect to a power source. The four-channel power amplification area has four completely independent signal input and power output channels, which are used to connect to corresponding devices to amplify the input signals. The fan area is used to cool the unit. The control circuit is located inside the chassis and is connected to the corresponding interfaces on the front and rear panels, respectively.

2. A four-channel power amplifier as described in claim 1, characterized in that, The power interface area is equipped with an AC power input socket, an AC power input fuse box, and a DC power input socket. The AC power input socket is used to connect to 220V AC power; The AC power input fuse box is used as an overcurrent protection switch. The DC power input port is used to connect a 48V DC power supply, and the current requirement is above 25A.

3. A four-channel power amplifier as described in claim 2, characterized in that, When the DC power input socket is connected to a 48V DC power supply, the wiring method for the small square power input socket is as follows: the 1+ and 2+ ports are connected to the positive terminal of the 48V DC power supply, and the 1- and 2- ports are connected to the negative terminal of the 48V DC power supply.

4. A four-channel power amplifier as described in claim 1, characterized in that, Each of the aforementioned signal input and power output channels is equipped with a power output interface, a signal input interface, a volume control knob, a bass control knob, and a treble control knob; The power output interface is used to output power to the corresponding device; The signal input interface is used to receive input signals; The volume control knob is used to control the magnitude of the output power amplifier signal; The bass control knob is used to adjust the output signal within a preset range when the input signal of the power amplifier is 100Hz. The treble control knob is used to adjust the output power within a preset range when the input signal of the power amplifier is 10kHz.

5. A four-channel power amplifier as described in claim 1, characterized in that, The fan area is equipped with a fan, which adopts an automatic continuously variable speed air-cooled working mode.

6. A four-channel power amplifier as described in claim 1, characterized in that, The front panel is provided with a ventilation area, an indicator light area, and a power control area; The ventilation zones are located on the upper and lower sides of the front panel to achieve ventilation for the entire unit; The indicator area includes four sets of indicator lights, which are used to indicate the output signal strength and working status of each signal input and power output channel; The power control area is used to control the power on / off of the entire machine and to display the power on / off status.

7. A four-channel power amplifier as described in claim 6, characterized in that, Each set of indicator lights is equipped with a signal indicator light, a peak reduction indicator light, and a protection indicator light; The signal indicator light is used to flash intermittently or continuously after an input signal is input and the volume knob is turned on, to indicate that an input signal is present in the power amplifier; The peak reduction indicator light is used to indicate that the output of the whole machine has been clipped, and at the same time indicates that the clipping distortion limiting circuit of the machine has started to work. The protection indicator light is used to indicate that the whole machine has entered the protection state.

8. A four-channel power amplifier as described in claim 6, characterized in that, The power control area includes a power indicator light and a power switch; The power indicator light is used to indicate whether the power connection of the power amplifier is intact. If it is lit, it indicates that the power connection of the power amplifier is intact and the power switch is in the on state. The power switch is used to control the power amplifier's on / off state.

9. A four-channel power amplifier as described in claim 1, characterized in that, The chassis adopts a 2U standard chassis design with a thickness of 6mm; the front and rear panels are made of 2U aluminum alloy panels.

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