A Key of Bluetooth Speaker or Bluetooth Amplifier --- Bluetooth module

A Key of Bluetooth Speaker or Bluetooth Amplifier --- Bluetooth module 

Bluetooth speakers or bluetooth amplifiers have become more and more popular now as wireless signal transmission. You could see them  every year at CES. At same time, bluetooth Technology had been improved from 1.0 version to 4.1 one now, it is can achieve CD level music for the bluetooth 4.0 version, and it is used hifi audio.You will not connect those signal input cable, only set up bluetooth connection between your bluetooth devices like as iPhone or android smartphone, tablet.Then, you can play stream music form your local disk or internel through WIFI, of course, you should install a music play, if it support to play lossless format such as WAV, APE, FLAC, APAC, it absolutely achieve CD quality. 

But do you know how it is used in PCB?  normally, it is soldered as a module where the bluetooth ic and other op ic will be soldered there, also the program will be burned on ROM inside previously.manufacturer purchase it from module supplier, which is customized by the supplier, for example display name on the host, prompt, volume..., and so on.We also provide those customizations. There is more stable and quality module that is made of CSR8645, which support apxt decoding.The moudles had been used in a lot of bluetooth speakers or amplifiers, like as FATMAN mini tube bluetooth amplifiers and other Bluetooth speakers by UK.Especially, the original manufacturer of bluetooth ic provide us strong support from PCB designing.

 It is better to start weaving your fishing nets than merely coveting fish at the water, right? If you want to  develop your high quality Bluetooth speaker or amplifier or modify your current audio system to ass wireless connection function, it will be a better choice.

This CSR8645 Rom Module Functions:

1. Bluetooth version 4.0 plus EDR standard specification.
2. Radio power: Class 2.
3. Support A2DP 1.2, AVRCP 1.4, HFP1.6(including WBS and Msbc), HSP1.2.,etc protocols.
4. Adopt CSR voice enhancing technology of latest sixth version CVC to realize noise reduction and echo cancellation.
5. Support multipoint connection (connection to 2 phone for voice and music)
6. Support CSR Secure Simple Pairing, Proximity Pairing and CSR Proximity connection.
7. Support user to define muliti-language voice prompt function.
8. Support voice dialing / rejection calling.
9. Support SBC, MP3, AAC, APT-X music format.

            10. Support output port: PIO / UART/SPI/AIO/SPK/MIC/USB.

            11. Built-in 16 bits stereo decoder, S/N of digital to analog convert is up to 95Db.

            12. Built-in DC DC conversion power management.

            13. Integrated Li-ion battery charging function, charging current is up to 400mA maximum.

            14. Smaller SMT package: 26.5mm*13mm*2.2mm.

            15. RoHS compliance.

 More details, please find http://www.aliexpress.com/store/product/CSR8645-ROM-Bluetooth-Module-Bluetooth-4-0-Mulitport-Output-Support-APT-X-Decoding-DIY-RoHS-Compliance/725205_1276174862.html

Or use this one with key board.

http://www.aliexpress.com/store/product/CSR8645-ROM-Bluetooth-Module-Bluetooth4-0-Mulitiport-Output-Support-APT-X-Decoding-With-Key-Board-DIY/725205_1644152718.html

Development Story of Portable Speakers System

Development Story of Portable Speakers System 

When popular style is becoming a trend, portable speakers begin to become popular as same as street dancing a couple years ago. Features of portable speakers is compact, portable, and quality sound to meet needs of people's daily lives, such as learning, entertainment, leisure, etc. It can play portable media such as SD card, TF card, USB disc and so on. Music signal as MP3 or WMA which are stored in these media above mentioned, and those music signals will be decoded by decoding circuit inside through digital-to-analog conversion, and then they will be amplified by power amplifier circuit to drive speakers for playback. Wistao technology released several products to markets.

Portable Speakers System

Stereo Portable Speakers System

Stereo Portable Speakers System

Speaking broadly, portable speakers is small in volume and distinguish itself from those larger HIFI home theaters, music centers, 2.0 or 2.1 multimedia speakers, etc.. General it’s volume are relatively small and can be easily put in bag, using storage card or wireless signal to play music media, and getting power from battery; its main advantages is portability. Not only indoor but outdoor can play normally. But anyway, it is a class of active loudspeakers. We will explore its development story from portable view.



Stereo or speakers were not considered as portable before transistor hit market. Perhaps you might also see some antique tube radios or phonographs working with horn speakers from film and television; they were generally to be placed somewhere in room like living room or reading room. If present electronic products compared with it from volume view, it will be described as a small sorcerer in the presence of a great one due to its bigger volume. By the way, you can find a computer at that time, which volume was larger as a building. With transistor application, electronics product’s volume became smaller and smaller, thinner and thinner. Last 1950s and 1960s, Sony used transistor technology to make radio and instant hit in the United States, opened U.S. market. And later Sony developed an innovative products Walkman, which could be said is an "originator" of portable speaker. It is an analog audio player based on tapes. After then CD emerged, it marked advent of  digital age, is " 0 " and " 1 "era, which greatly improved sound quality of audio playback.CD avoid mechanical wear as tape player due to its non-contact signal reading technology, also avoid distortion of the signal source. After two or three decades, Internet age was coming. Industry found a 640M CD disc that can be stored only ten to twelve tracks, CD disc capacity is limited and does not facilitate transmission within networks, so they developed music compression format technology firstly --- MP3 format, that did not affect the sound quality of  music, and track capacity became smaller from 30 to 40 megabytes of CD format to only a few megabytes of compressed MP3 format for a same track, so it’s transmission within internet network becomes very easy. During this period, portable CD player based on a CD disc media called Discman emerged; its music is listened by headphones. And MP3 player was also hit market as portable music devices, but it needs to use headphones to listen.



With popularity of desktop PC, multimedia speakers have become a standard of the computer active speakers, but it can only be accompanied by the computer around as much less as portable. During the period, a variety of digital products such as SD card, TF card, USB disk were be developed, and their storage capacity was also growing; Large capacity rechargeable battery and LSI Class D amplifier were adopted on portable speaker, it made portable powered speakers miniaturization, which also led to emergence of digital portable speakers, to achieve a truly "portable", which is digital portable speaker today.



Technology continues to progress, and it has also changed our lives. With advent of powerful decoder chips, portable speakers’ feature also is becoming more and more powerful, many functions have been added to portable speaker, lyrics display, repeat, breakpoint memory, multi-format music player, etc.; while added bass enhancement technology to speakers’ cavity, it can reproduce familiar quality sound as HIFI speaker.

What Could Wireless Bluetooth Speaker Taken? --- Wireless Convenience of A Wonderful Experiences!

What Could Bluetooth Wireless Speaker Taken? --- Wireless Convenience of A Wonderful Experiences!

Era of smart mobile terminals is coming, they have become more and more popular and fashion product, such as IPHONE, IPAD and many Android smart phone and tablet computer and gradually Bluetooth system has also become a standard configuration of the mobile terminal. Those mobile terminal device achieve a trend to integrate a great music, video, games and other application functionality, and even mobile phones and other portable digital products could not been taken away from our daily lives. For example, online map, microblogger, e-mail, instant messaging is a typical example. From begining in 2011, main manufacturers of speaker have begun to enter the market segments of Bluetooth wireless speaker. Shenzhen Wistao Technology (http://www.wistao.com) had developed different series of Bluetooth speaker through market research to grasp trend of Bluetooth product development.

For such handheld portable devices of smart phone or tablet, wired speaker is clearly inappropriate due to highly mobile, but it will be more comfortable to use Bluetooth wireless speaker.

With Bluetooth wireless speakers, what can we do indeed? Take a look, and share it!

A.   When you get together with friends, or are picnic on the country side, or take leisure time and do exercise, you can use your phone to play the music, but it will reduce acoustics of music greatly. However, Bluetooth speakers, you can enjoy the beautiful, first-class sound quality of music without cable connection, also you do not have to worry about the battery problem.

B.   Share network radio like as BBC music, CNN radio, WIN7 Internet radio, etc. Together better than alone, when we would like to share our collection of music at the party, you will first think of the speakers, Bluetooth speakers must be the best choice at this time, almost without limit by distance indoors . In this way, you can not endure the bad phone or laptop sound.

C.   High quality of game experiences for all games almost. At beginning, games of mobile phone just to design to kill time only, but today's mobile games have been very strong functions with hardware to enhance the level. Not only from visual effects and sound but also game-playing do reach a very high level. And like as Gameloft and Popcap companies, They had been released a large number of outstanding game for smart phones or tablets. In addition, such as the music game as DJMax, it also will demand a higher sound output.

D.   Suitable for mobile television demand (Thunder, You Tube, Sina video, etc.). Online movies and TV series has also become one of the important functions of the portable devices, because of online video software easy to use, many people return home and use iPad or smart phone to watch video instead of computer. This operation has two advantages, one is to simplify operation between speaker and amplifier, another advantage is that you can curl up on the couch or lie in bed or sit at desk. Using mart phone or tablets is certainly much more convenient than computer, this arbitrariness is obviously not suitable for wired speakers.

E.   Hands-free answering the phone. Avoid prolonged to answer phone calling, and the impact of the hearing, while reducing smart phone radiation. Also, liberate your hands while call is coming.

F.    May be used to hold a conference call. The clear call feature can be used to hold a conference call.