CN202095058U - Active ceiling speaker system - Google Patents
Active ceiling speaker system Download PDFInfo
- Publication number
- CN202095058U CN202095058U CN2011202081842U CN201120208184U CN202095058U CN 202095058 U CN202095058 U CN 202095058U CN 2011202081842 U CN2011202081842 U CN 2011202081842U CN 201120208184 U CN201120208184 U CN 201120208184U CN 202095058 U CN202095058 U CN 202095058U
- Authority
- CN
- China
- Prior art keywords
- preamplifier
- power amplifier
- utility
- sound
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000005236 sound signal Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model discloses an active ceiling speaker system which is convenient to use in a small environment in order to reduce the cost and improve the audio fidelity. The active ceiling speaker system can output a sound source to a plurality of speakers. A preamplifier and a power amplifier are sequentially connected between each speaker and the sound source. Particularly, a impedance converter is connected between the preamplifier and the power amplifier.
Description
Technical field
The utility model relates to a kind of ceiling loudspeaker system (background music system), relates in particular to a kind of active ceiling loudspeaker system.
Background technology
The ceiling loudspeaker system, also be background music system, the modes that adopt broadcast type more, give broadcasting special-purpose level pressure amplifirer the audio signal transmission of audiogenic device, low-voltage signal is raise, high power transmission is given a plurality of volume controllers, again high pressure is reverted to low pressure, pass to the audio amplifier loud speaker, realize the level pressure transmission, the broadcasting operational mode that cluster is play.
The power amplifier that this kind pattern is adopted, different with our common power amplifier, be the level pressure power amplifier, can not substitute with general family expenses power amplifier.The system that the level pressure power amplifier is formed is commonly called as broadcast system, in order to realize long-distance transmissions, after the signal power amplification, utilizes line transformer to promote output voltage, generally is 70 ~ 120V.After terminal, utilize line transformer step-down matched impedance again, drive audio amplifier, its cost is higher, and the audio signal of the ceiling loudspeaker system of this pattern is becoming low pressure then through the output of high pressure level pressure, can cause distortion, for home sound, transmission range is nearer
In addition, broadcast type ceiling loudspeaker system installs complicated, can't realize the adjusting of independent switch and volume in each zone of voice playing, is not suitable for using in zonule environment such as family or office.
Summary of the invention
In order to reduce cost, improve the fidelity of audio frequency, the active ceiling loudspeaker system that the utility model proposes that a kind of convenience uses in the environment of zonule, it exports to a plurality of loud speakers with source of sound, is connected preamplifier and power amplifier successively between each loud speaker and source of sound.Especially, be connected impedance transformer between described preamplifier and power amplifier.
Further, source of sound is connect one by one transmission or transmission in parallel of a plurality of preamplifiers to the audio signal transmission of each preamplifier.
Other features and advantages of the utility model will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the utility model.The purpose of this utility model and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Introduce preferred embodiment below in conjunction with accompanying drawing, the technical scheme that the utility model proposes is described in detail.Should be noted that the purpose of accompanying drawing just is convenient to the explanation to the utility model specific embodiment, is not a kind of unnecessary narration or to the restriction of the utility model scope.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one.
Fig. 2 is the structural representation of the utility model embodiment two.
Embodiment
As depicted in figs. 1 and 2, active ceiling loudspeaker system is by source of sound 1 and organize preamplifier 2, impedance transformer 3, power amplifier 4 and loud speaker 5 more and form.The audio signal of source of sound 1 output reduces impedances by impedance transformer 3 after preamplifier 2 amplifies, reduce noise, exports to power amplifier 4, and audio signal directly is transferred to loud speaker 5 after amplifying, so sound can distortion, the fidelity height.
The utility model is that every road loudspeaker terminals is provided with independently power amplifier, independently switch and volume adjustment knob can be set at the broadcast scene, and make things convenient for independent maintenance, because the component units volume is little, connects simply simultaneously, makes things convenient for the installation of system.
Need to prove that embodiment one shown in Figure 1 exports to each preamplifier 2 step by step with the audio signal of source of sound 1, embodiment two shown in Figure 2 is transferred to each preamplifier 2 respectively with the audio signal of source of sound 1.
The above only is a preferred implementation of the present utility model; but not to be the limitation of the utility model scope should be understood that for they; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, some improvements and modifications of having done also should be considered as within the protection range of the present utility model.
Claims (3)
1. an active ceiling loudspeaker system exports to a plurality of loud speakers with source of sound, it is characterized in that, is connected preamplifier and power amplifier successively between each loud speaker and source of sound.
2. ceiling loudspeaker according to claim 1 system is characterized in that, is connected impedance transformer between described preamplifier and power amplifier.
3. ceiling loudspeaker according to claim 1 system is characterized in that, source of sound is connect one by one transmission or transmission in parallel of a plurality of preamplifiers to the audio signal transmission of each preamplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202081842U CN202095058U (en) | 2011-06-20 | 2011-06-20 | Active ceiling speaker system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202081842U CN202095058U (en) | 2011-06-20 | 2011-06-20 | Active ceiling speaker system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202095058U true CN202095058U (en) | 2011-12-28 |
Family
ID=45370097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202081842U Expired - Lifetime CN202095058U (en) | 2011-06-20 | 2011-06-20 | Active ceiling speaker system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202095058U (en) |
-
2011
- 2011-06-20 CN CN2011202081842U patent/CN202095058U/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102137319B (en) | Earphone capable of eliminating noise and driving circuit thereof | |
| TW201301908A (en) | Electronic device and audio output control method | |
| CN103297894A (en) | Earphone power amplifier, working method and mobile terminal equipment | |
| CN102118668B (en) | Speaker system and speaker driver circuit | |
| CN105848025A (en) | Wireless karaoke-singing earphone | |
| CN202095058U (en) | Active ceiling speaker system | |
| CN201230368Y (en) | Electronic tube and solid electronic sound division mixing power amplifier | |
| CN203193848U (en) | Noise canceling headphones and their headphone plugs | |
| CN105100999A (en) | Dual impedance earphone | |
| CN201839418U (en) | KTV (karaoke television) compartment speaker system | |
| CN203205048U (en) | Multifunctional portable electric guitar | |
| CN204836591U (en) | A sound channel reverberation system for cell -phone | |
| CN204068875U (en) | based on the multi-channel digital audio amplifier of FPGA | |
| CN202168037U (en) | Push-pull amplifier system for single-ended output transformer | |
| CN202663542U (en) | Automatic wired broadcast switching system | |
| CN204993809U (en) | Dual track audio power amplifier circuit | |
| CN202121756U (en) | A guitar speaker | |
| CN204498351U (en) | A kind of television set with Wireless microphone receiver | |
| CN202949393U (en) | Electron tube preceding stage audio frequency amplifier | |
| CN205039780U (en) | Take dual power supply's dual track audio power amplifier circuit | |
| CN220915400U (en) | Active noise reduction earphone based on multistage amplifying circuit | |
| CN203482378U (en) | Active sound box | |
| CN204090111U (en) | The pneumatic type height figure sound system of modular DSP digital technology adjustment | |
| CN205305099U (en) | Multi -purpose audio -visual education programme active audio amplifier | |
| CN2718927Y (en) | 4. 2 acoustic channel family cinema surrounding earphone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111228 |
|
| CX01 | Expiry of patent term |