1. Introduction

The phone's built-in speaker is too poor, so I made a small speaker with a mobile phone clip.

When watching the drama, the sense of presence is UP, the bass is deep, and the vocals are delicate.

The block diagram is as follows: relatively simple.

2. Core components

KCX_BT010 module, I bought it in Uxin Electronics, and it seems that there are other houses that sell it, and Uxin Electronics is expensive.

https://item.taobao.com/item.htm?spm=a1z09.2.0.0.2e0d2e8dcybZSj&id=631281771981&_u=oqavhl8e96f

3. EQ recommendation

Since this module does not have built-in EQ adjustment,So I recommend EQ as follows,EQ adjuster is in Xiaomi's built-in Dolby sound.

4. Shell

Draw using SW, see Attachment: Mobile Phone Audio 3D.7z.

Left and right independent cavities.

The shell can be directly covered, no need to seal the air, and the passive disc position is reserved, but the thicker horn is not recommended, and the passive disc position needs to be sealed.

The speaker can be 3 inches, but pay attention to whether the screws can be hit, if not, you need to change the shell.

5. Summary

It's definitely stronger than the phone's own speaker, and it's also good to remove the phone holder as an outdoor speaker.