CN216313393U

CN216313393U - KTV sound system based on subwoofer

Info

Publication number: CN216313393U
Application number: CN202122665049.7U
Authority: CN
Inventors: 宋军辉; 郑全录; 于燕燕
Original assignee: Shen Zhen Neusound Co ltd
Current assignee: Shen Zhen Neusound Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-04-15
Anticipated expiration: 2031-11-02

Abstract

The utility model relates to a KTV sound system, in particular to a KTV sound system based on a subwoofer, which comprises an audio power amplifier, a subwoofer and sound channel sound boxes, wherein the audio power amplifier is provided with a sound channel power amplifier unit and the subwoofer power amplifier, the output of the subwoofer power amplifier is connected with the subwoofer, the sound channel power amplifier unit is provided with a plurality of sound channel power amplifiers, the number of the sound channel sound boxes is the same as that of the sound channel power amplifiers, the sound channel sound boxes correspond to the sound channel power amplifiers one by one, and each sound channel sound box is connected with the corresponding sound channel power amplifier; the subwoofer comprises a subwoofer box body and an active subwoofer and a passive subwoofer which are respectively arranged on the subwoofer box body. The 2.1 sound system with the subwoofer replaces the traditional 2-channel KTV2.0 sound system, and the effects of greatly reduced volume, easiness in installation, more attractive appearance, better tone quality and greatly reduced cost are achieved.

Description

KTV sound system based on subwoofer

Technical Field

The utility model relates to a KTV sound system, in particular to a KTV sound system based on a subwoofer.

Background

Along with the progress of times and the improvement of living standard of people, people have higher and higher requirements on KTV sound, and a KTV sound system with brand-new technology, high sound quality, low cost, small volume, easy installation and beautiful shape is urgently needed. The disadvantages of current KTV audio systems are as follows:

1. the current KTV ward sound system or the family KTV sound system is a 2.0 system with two sound channels, the power amplifier of the KTV ward sound system is output by a left sound channel and a right sound channel, the left sound channel and the right sound channel are respectively driven by the power amplifier, and the two sound boxes complete electro-acoustic conversion; thus, each enclosure is a full range enclosure, i.e., the electro-acoustic conversion of bass, midrange, treble all needs to be done by one enclosure. For this reason, a dual speaker system is generally adopted, i.e. a center bass speaker and a tweeter are arranged in the sound box to form a two-frequency division system. In order to achieve good bass effect, the bass loudspeaker with large size inches such as 8 inches to 12 inches is used. Because the technology of the open box type closed box in the traditional technology is adopted, the volume of the box body is about 40 liters to 60 liters. In the KTV room arrangement, the large sound box with 40-60 liters is hung on the wall on the left and right.

2. The above KTV audio system brings about the following disadvantages:

A. the box body is too large to be placed and installed easily;

B. because the middle and low tones are all converted by the same loudspeaker, which is a part-time work, the effects of the middle and low tones cannot be optimal, and the middle tone of the 10-12 inch loudspeaker is inferior and poor;

C. large-diameter speakers and large-capacity cabinets, which result in high cost;

D. the cabinet is too large, making the KTV room aesthetically bad.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of the existing KTV sound system, the utility model aims to provide a KTV sound system based on a subwoofer.

The purpose of the utility model is realized by the following technical scheme:

the audio amplifier comprises an audio amplifier, a subwoofer and sound channel sound boxes, wherein the audio amplifier is provided with a sound channel power amplifier unit and a subwoofer power amplifier, the output of the subwoofer power amplifier is connected with the subwoofer, the sound channel power amplifier unit is provided with a plurality of sound channel power amplifiers, the number of the sound channel sound boxes is the same as that of the sound channel power amplifiers, the sound channel sound boxes correspond to the sound channel power amplifiers one by one, and each sound channel sound box is connected with the corresponding sound channel power amplifier; the subwoofer comprises a subwoofer box body and an active subwoofer and a passive subwoofer which are respectively arranged on the subwoofer box body.

Wherein: audio power amplifier includes sound channel power amplifier unit, subwoofer power amplifier, subwoofer frequency divider, KTV left sound channel input, KTV right sound channel input and subwoofer volume adjustment, KTV left sound channel input is the input of audio power amplifier with KTV right sound channel input, the audio power amplifier input that KTV left sound channel input and KTV right sound channel input constitute is connected with sound channel power amplifier unit, still passes through in proper order subwoofer frequency divider, subwoofer volume adjustment are connected with subwoofer power amplifier.

The audio frequency power amplifier is arranged in the bass box body, or the bass power amplifier and the bass frequency divider are arranged in the bass box body, or each sound channel power amplifier is respectively arranged in the sound channel sound box body of the corresponding sound channel sound box.

The subwoofer is composed of one, two or more than two independent subwoofers, each independent subwoofer comprises an active subwoofer and a pair of passive subwoofers, and the pair of passive subwoofers is correspondingly arranged; when two or more independent subwoofers are integrated or separated; when the subwoofers are of an integrated structure, a subwoofer array is formed; when the structure is a split structure, the independent subwoofers are respectively placed at the corners of the room.

Every independent subwoofer all has confined subwoofer box, every be equipped with a pair of passive woofer and at least one initiative woofer in the subwoofer box at least, each the quantity of the passive woofer in the subwoofer box is the same, the quantity of initiative woofer is the same.

And the passive woofers and the active woofers of the subwoofer are respectively and symmetrically arranged.

And the passive woofer and the active woofer of the subwoofer are both arranged on the same box wall.

The sound channel sound boxes are two, four or five, and form a 2.1, 4.1 or 5.1 home theater system or a music center.

The sound channel sound box comprises a sound channel sound box body, and only a sound channel main loudspeaker or a sound channel main loudspeaker and a sound channel high pitch loudspeaker are arranged on the sound channel sound box body.

The subwoofer is in wired or wireless connection with the subwoofer power amplifier of the audio power amplifier, and the sound channel sound box is in wired or wireless connection with the sound channel power amplifier unit of the audio power amplifier.

The utility model has the advantages and positive effects that:

1. the utility model uses the small-caliber subwoofer loudspeaker (4.5 inches), the small-volume subwoofer (only about 10 liters) and the small-volume left and right sound channel sound boxes (about 2 liters each) to replace a pair of 10-12 inches large-caliber loudspeaker and 40-60 liters large-box sound boxes of the traditional KTV, thereby greatly reducing the cost of an electroacoustic conversion system.

2. The utility model adopts the three-frequency-division electro-acoustic conversion system, bass is emitted by the subwoofer, middle tone is emitted by the left and right channel middle tone loudspeakers, and high tone is emitted by the left and right channel high tone loudspeakers, which are both special workers, the tone quality is better, and the defect that the two-frequency-division bass middle tone is all emitted by the same loudspeaker is overcome.

3. The sound channel sound box and the bass box are very small, and are easier to place and set in a KTV room.

4. The left and right sound channel sound box bodies are thin and can be embedded into a KTV wall, and a KTV room is more attractive and tidy and is easier to install.

5. The bass gun adopts the active bass loudspeaker and the passive bass loudspeaker which are symmetrically arranged in pairs, the vibration directions of the vibrating diaphragms are opposite, the amplitudes are equal, and the vibration force is offset, so that the vibration of the box body is greatly reduced, and the bothersome movement and noise of the sound box are reduced.

6. The utility model can be used for KTV sound equipment, and can also become a home theater system or a music playing center of 2.1 (front left, front right, back left, back right four channels plus subwoofer channels), 4.1 (front left, front right, back left, back right, middle five channels plus subwoofer channels) or 5.1 (front left, front right, back left, back right, middle five channels plus subwoofer channels).

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2A is a top cross-sectional view of a subwoofer according to an embodiment of the present invention;

FIG. 2B is a side cross-sectional view of FIG. 2A;

FIG. 3A is a front cross-sectional view of the vocal tract speaker of the present invention;

FIG. 3B is a side view of FIG. 3A;

FIG. 4A is a top cross-sectional view of a subwoofer according to an embodiment of the present invention;

FIG. 4B is a side cross-sectional view of FIG. 4A;

FIG. 5A is a top cross-sectional view of a three subwoofer embodiment of the present invention;

FIG. 5B is a side cross-sectional view of FIG. 5A;

wherein: 1 is audio power amplifier, 2 is the subwoofer, 3 is the sound channel audio amplifier, 4 is the sound channel audio amplifier box, 5 is sound channel power amplifier unit, 6 is the subwoofer power amplifier, 7 is the subwoofer frequency divider, 8 is the left sound channel input of KTV, 9 is the right sound channel input of KTV, 10 is initiative woofer, 11 is passive woofer, 12 is the subwoofer box, 13 is the volume adjustment of subwoofer, 14 is the sound channel tweeter, 15 is the main speaker of sound channel.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The audio amplifier comprises an audio power amplifier 1, a subwoofer 2 and sound channel sound boxes 3, wherein the audio power amplifier 1 is provided with a sound channel power amplifier unit 5 and a subwoofer power amplifier 6, the output of the subwoofer power amplifier 6 is connected with the subwoofer 2, the sound channel power amplifier unit 5 is provided with a plurality of sound channel power amplifiers, the sound channel sound boxes 3 are provided with a plurality of sound channel sound boxes, the number of the sound channel sound boxes 3 is the same as that of the sound channel power amplifiers, the sound channel sound boxes correspond to the sound channel power amplifiers one by one, and each sound channel sound box 3 is connected with the corresponding sound channel power amplifier; every independent subwoofer of subwoofer 2 all includes subwoofer box 12 and installs initiative woofer 10 and passive woofer 11 on subwoofer box 12 respectively, and passive speaker 11 quantity is for pairing, and corresponds the setting. The sound channel sound boxes 3 are at least 2, the subwoofers 2 can be one or two or more subwoofers form an array, and the subwoofers can be physically connected into a whole or can be separately placed. The KTV room can be placed on the ground close to the wall or hung on the wall close to the ground. The acoustic channel enclosures 3 are preferably two or four, respectively suspended or built in the upper middle of the wall of the KTV room, preferably near the listener's planar height. Such an audio system may be made as a 2.1, 4.1, 5.1 or 7.1 audio system. And can well form a typical home theater or music playing system. The subwoofer 2 is in wired or wireless connection with the subwoofer power amplifier 6 of the audio power amplifier 1, and the sound channel sound box 3 is in wired or wireless connection with the sound channel power amplifier unit 5 of the audio power amplifier 1.

The subwoofer 2 can be made into an integral or split structure when consisting of two or more independent subwoofers; when the subwoofers are of an integrated structure, each individual subwoofer forms a subwoofer array; when the subwoofer is of a split structure, the independent subwoofers can be placed at the corners of a room respectively. Each independent subwoofer is provided with a closed subwoofer box body 12, at least one pair of passive subwoofers 11 and at least one active subwoofer 10 are arranged in each subwoofer box body 12, and the number of the passive subwoofers 11 and the number of the active subwoofers 10 in each subwoofer box body 12 are the same.

The passive woofer 11 and the active woofer 10 of the subwoofer 2 are respectively and symmetrically arranged, or the passive woofer 11 and the active woofer 10 of the subwoofer 2 are both arranged on the same box wall.

The sound channel loudspeaker boxes 3 are two, four or five, and form a home theater system or a music center of 2.1, 4.1 or 5.1. The sound channel enclosure 3 includes a sound channel enclosure 4, and the sound channel enclosure 4 is provided with only a sound channel main speaker 15 or with the sound channel main speaker 15 and a sound channel tweeter 14.

Example one

As shown in fig. 1, the audio power amplifier 1 of this embodiment is a PCB (printed circuit board), on which a subwoofer power amplifier 6 is arranged, a sound channel power amplifier unit 5, a subwoofer frequency divider 7, a KTV left sound channel input 8, a KTV right sound channel input 9 and a subwoofer volume adjustment 13 are arranged, the KTV left sound channel input 8 and the KTV right sound channel input 9 are inputs of the audio power amplifier 1, the input end of the audio power amplifier 1 formed by the KTV left sound channel input 8 and the KTV right sound channel input 9 is connected with the sound channel power amplifier unit 5, and the audio power amplifier 1 is further connected with the subwoofer power amplifier 6 through the subwoofer frequency divider 7 and the subwoofer volume adjustment 13 in sequence. The subwoofer power amplifier 6 is a subwoofer power amplifier and adopts an integrated circuit to carry out power amplification, and the output of the integrated circuit is connected with the subwoofer 2; the subwoofer power amplifier 6 can be an A/B type power amplifier, and also can be a D type digital power amplifier, which is a D type digital power amplifier in the embodiment. The subwoofer volume adjustment 13 is used for adjusting the volume of bass to achieve the balance of bass and middle treble, and the subwoofer volume adjustment 13 can be electronic or physical, such as a potentiometer; the subwoofer volume adjustment 13 of the present embodiment is electronic, and the subwoofer volume is adjusted by a conventional method of changing the gain of an electronic circuit. The sound channel power amplifier is a full-frequency power amplifier, namely bass, middle-pitch and treble full-frequency output, and is realized by chips, and the chips can be D-type digital power amplifier chips and also can be A/B-type power amplifier chips; the sound channel power amplifier of the embodiment is a D-type digital power amplifier and comprises two R.L amplifiers, and two paths of audio power output of the R.L amplifiers are respectively connected with the two sound channel sound boxes 3. The KTV left sound channel input 8 and the KTV right sound channel input 9 are input of an audio power amplifier 1 and are respectively connected with R.L output of a KTV song requesting machine. The subwoofer frequency divider 7 is an electronic frequency divider, and outputs a low-frequency signal of 20Hz to 200Hz to the subwoofer power amplifier 6 through an electronic circuit after mixing the two paths of input signals, and the frequency dividing point of the embodiment is 120 Hz. The audio power amplifier 1 is arranged in the subwoofer box body 12, or the subwoofer power amplifier 6 and the subwoofer frequency divider 7 are both arranged in the subwoofer box body 12, or each sound channel power amplifier is respectively arranged in the sound channel sound box body 4 of the sound channel sound box 3 corresponding to each sound channel power amplifier; the audio power amplifier 1 can also be arranged in a case of a unit and can also be arranged in a KTV song requesting machine.

As shown in fig. 2A and 2B, the subwoofer 2 of the present embodiment includes a subwoofer 10, a passive subwoofer 11 and a subwoofer box 12, and the number of the subwoofers 2 may be one, or two or more; the present embodiment is two and the two subwoofers are designed as one piece. The passive woofer 11 is also called a bass radiator, which has no magnetic circuit and voice coil, and only a diaphragm and a supporting structure thereof; in the present embodiment, each subwoofer 2 has a pair of two passive woofers 11, the pair of passive woofers 11 are arranged symmetrically with each other, and the caliber of each passive woofer 11 is 4 "x 7" racetrack-shaped. One or more active woofers 10 are provided for each subwoofer, in this embodiment, each subwoofer is provided with a woofer with a diameter of 4.5 inches, so that the two subwoofers 10 are totally provided and respectively arranged opposite to the integrated subwoofer box body 12, so that the two active subwoofers 10 sound with opposite vibration directions and equal vibration amplitudes, and the vibration force is offset, thereby greatly reducing the vibration of the subwoofer box body 12; meanwhile, each pair of passive woofers 11 of each subwoofer box body 12 are also symmetrically arranged, and the same vibration directions are opposite, the vibration amplitudes are equal, the vibration force is offset, and the vibration of the subwoofer box body 12 is greatly reduced. Thus, the vibration of the subwoofer box body 12 is greatly reduced, the vibration displacement of the subwoofer box body on the ground is eliminated, and meanwhile, the noise caused by the vibration is reduced. The subwoofer box body 12 can be made of plastic or wood or metal materials, and the volume of the subwoofer box body is 3 liters to 8 liters; this embodiment is made of wood, and each subwoofer has a volume of about 5 liters.

As shown in fig. 3A and 3B, two sound channel speakers 3 may be provided to perform the electro-acoustic conversion of the left and right sound channels; or four. Each channel enclosure 3 includes a channel main speaker 15 and a channel tweeter 14, or the channel tweeter 14 may not be provided, in which case the channel main speaker 15 is a full range speaker. The sound channel main loudspeaker 15 can be a loudspeaker from 3 inches to 6 inches, and the sound channel high pitch loudspeaker 14 can be a high pitch loudspeaker from 1 inch to 4 inches. In this embodiment, the main speakers of each channel speaker 3 are 4.5 inches in diameter, plus a 3 inches tweeter. The sound channel sound box body 4 can be of a phase inversion type or a closed type, and the volume of the sound channel sound box body is 1-5 liters; this embodiment is a closed box with a volume of 2 liters. The channel tweeter 14 of the present embodiment employs an LC physical divider with a frequency division of about 5 KHz.

Example two

As shown in fig. 4A and 4B, the difference between the present embodiment and the first embodiment is: the subwoofer 2 of the present embodiment is two, and the two subwoofer boxes 12 are not integrally connected but are separated from each other. When in use, the KTV can be put together and also can be separately put at different positions in the KTV compartment. In addition, the active woofer 10 is provided on the upper wall of the subwoofer box 12, and is not provided on the side wall of the subwoofer box 12 as in the first embodiment. The rest is the same as the first embodiment.

EXAMPLE III

As shown in fig. 5A and 5B, the difference between the present embodiment and the first embodiment is: the installation plane of the active woofer 10 of the subwoofer 2 of the present embodiment is coplanar or parallel to the installation plane of a pair of passive woofers 11, and the pair of passive woofers 11 are symmetrically disposed on the same plane with the active woofer 10 as a center. The rest is the same as the first embodiment.

The working principle of the utility model is as follows:

l, R two-channel audio signals output from the KTV song requesting system are simultaneously output to the sound channel power amplification unit 5 and the subwoofer frequency divider 7 through a KTV left sound channel input 8 and a KTV right sound channel input 9, the sound channel power amplification unit 5 respectively transmits amplified full-frequency audio power signals to each sound channel sound box 3, the middle-pitch and bass electro-acoustic conversion is completed through the sound channel main loudspeaker 15, meanwhile, the LC frequency divider is prevented from transmitting audio below 5KHz, and high-pitch signals above 5KHz are transmitted to each sound channel high-pitch loudspeaker 14 to complete the electro-acoustic conversion of high pitch. Meanwhile, L, R two paths of signals input to the subwoofer frequency divider 7 are mixed firstly and then enter the subwoofer frequency divider 7, the audio signals above 120Hz are blocked, 20 Hz-120 Hz bass signals are transmitted to the subwoofer power amplifier 6 after being subjected to subwoofer volume adjustment 13, the bass audio power output by the subwoofer power amplifier 6 is transmitted to each active subwoofer 10 of the subwoofer 2, sound air flow in a subwoofer box body 12 generated by the active subwoofer 10 drives each passive subwoofer to vibrate through an acoustic air spring, and thus, the active subwoofer 10 and each passive subwoofer 11 generate resonance to jointly complete the electro-acoustic conversion of bass.

Therefore, the utility model realizes that the three-frequency-division high-fidelity electroacoustic conversion system with low tone emitted by a subwoofer, middle tone emitted by a main sound channel loudspeaker and high tone emitted by a sound channel high tone loudspeaker respectively plays roles, overcomes the defect of concurrent functions, perfectly realizes the conversion of the low tone, the middle tone and the high tone, and improves the tone qualities of the low tone, the middle tone and the high tone. Meanwhile, the system cost is greatly reduced. The total volume of the box body of the KTV is only 20% of that of the traditional KTV, so that the KTV is more convenient to install, and meanwhile, the KTV room is more attractive.

Claims

1. The utility model provides a KTV sound system based on subwoofer which characterized in that: the sound channel power amplifier comprises an audio power amplifier (1), a subwoofer (2) and sound channel sound boxes (3), wherein the audio power amplifier (1) is provided with a sound channel power amplifier unit (5) and a subwoofer power amplifier (6), the output of the subwoofer power amplifier (6) is connected with the subwoofer (2), the sound channel power amplifier unit (5) is provided with a plurality of sound channel power amplifiers, the sound channel sound boxes (3) are multiple, the number of the sound channel sound boxes (3) is the same as that of the sound channel power amplifiers, the sound channel sound boxes correspond to the sound channel power amplifiers one by one, and each sound channel sound box (3) is connected with the corresponding sound channel power amplifier; the subwoofer (2) comprises a subwoofer box body (12) and an active subwoofer (10) and a passive subwoofer (11) which are respectively arranged on the subwoofer box body (12).

2. The subwoofer-based KTV sound system of claim 1, wherein: audio power amplifier (1) is including sound channel power amplifier unit (5), subwoofer power amplifier (6), subwoofer frequency divider (7), KTV left channel input (8), KTV right channel input (9) and subwoofer volume adjustment (13), KTV left channel input (8) are the input of audio power amplifier (1) with KTV right channel input (9), audio power amplifier (1) input that KTV left channel input (8) and KTV right channel input (9) constitute is connected with sound channel power amplifier unit (5), still passes through in proper order subwoofer frequency divider (7), subwoofer volume adjustment (13) are connected with subwoofer power amplifier (6).

3. The subwoofer-based KTV sound system of claim 2, wherein: place in audio frequency power amplifier (1) in subwoofer box (12), or subwoofer power amplifier (6) set up in subwoofer box (12), or subwoofer power amplifier (6), subwoofer frequency divider (7) all set up in subwoofer box (12), or each sound channel power amplifier sets up respectively in sound channel audio amplifier box (4) of the sound channel audio amplifier (3) that correspond separately.

4. The subwoofer-based KTV sound system of claim 1, wherein: the subwoofer (2) consists of one, two or more independent subwoofers, each independent subwoofer comprises an active subwoofer (10) and a pair of passive subwoofers (11), and the pair of passive subwoofers (11) are correspondingly arranged; when two or more independent subwoofers are integrated or separated; when the subwoofers are of an integrated structure, a subwoofer array is formed; when the structure is a split structure, the independent subwoofers are respectively placed at the corners of the room.

5. The subwoofer-based KTV sound system of claim 1 or 4, wherein: each independent subwoofer all has confined subwoofer box (12), every be equipped with a pair of passive woofer (11) and at least one initiative subwoofer (10) in subwoofer box (12) at least, each the quantity of passive woofer (11) in subwoofer box (12) is the same, the quantity of initiative subwoofer (10) is the same.

6. The subwoofer-based KTV sound system of claim 1, wherein: and the passive woofer (11) and the active woofer (10) of the subwoofer (2) are respectively and symmetrically arranged.

7. The subwoofer-based KTV sound system of claim 1, wherein: and the passive woofer (11) and the active woofer (10) of the subwoofer (2) are both arranged on the same box wall.

8. The subwoofer-based KTV sound system of claim 1, wherein: the sound channel sound boxes (3) are two, four or five, and form a home theater system or a music center of 2.1, 4.1 or 5.1.

9. The subwoofer-based KTV sound system of claim 1, wherein: the sound channel sound box (3) comprises a sound channel sound box body (4), and the sound channel sound box body (4) is only provided with a sound channel main loudspeaker (15) or is provided with a sound channel main loudspeaker (15) and a sound channel high pitch loudspeaker (14).

10. The subwoofer-based KTV sound system of claim 1, wherein: the sound channel loudspeaker box is characterized in that the subwoofer (2) is in wired or wireless connection with the subwoofer power amplifier (6) of the audio power amplifier (1), and the sound channel loudspeaker box (3) is in wired or wireless connection with the sound channel power amplifier unit (5) of the audio power amplifier (1).