nameBLUE ST-11 dissected 拆机 拆开 没有aptx

Part 1 - 1st September 2014

Bought this as a toy in Shenzhen, China for US$20 = CNY￥120 = MYR$60, worst case is to replace the microspeakers with better units for better sound. How bad can it be right?

在深圳华强北买了，计划把喇叭换更好的。可以有多难？

First thing to check is if it really has aptx? for that price, doesn't surprise me if it doesn't. And here proves it doesn't, :( hate it when I'm right. Android adb logcat -v long >filename.txt. Oh never mind, just swap in better microspeakers then, can't hope much from US$20.

第一检查有否aptx，结果是没有的，请看附件内容。

Next is equalization, play single sided channel pink noise WAV (FLAC) from mobile phone through bluetooth SBC to this earphone, into IEC711 setup with a XXXXX microphone, finally RTA read by CLIOwin by Audiomatica, it is found that both sides are playing....... strange .............

下步是调音，播放单一边绯红噪音发现双边同时有声。莫名其妙。

Then rip it open to have a look and LUCKY, found the CHIP code, hence download and how bad can it be right? WORST !!!!! it is MONO !!!!! CSR8610_datasheet

然后拆机发现芯片是CSR8610,官方规格书显示单音路。

Check if the microspeakers are direct hard wire together? YES!!!! which is bad.

再检查线路，发现两个喇叭是焊接在一起的。

Anyway, some photos

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Part 2 - to come later.

A proper aptx chip would be CSR8645, which has all the same PINouts ball grip. But how to load in the correct firmware? software? keyware? I can't just swap in a empty chip??? is it this way? that way? find out more........

下步，找方案屋了解了解能不能换上CSR8645，和软件的上传/刷机事情。

End. 结束。