How to upgrade sound effect (Vacuum Tube Speaker)

If you want to make a different sound effect, just tell us!

Yinku Audio can help to customized the sound according to you!

Here is the upgrade step:

1. put the sound effect upgrade file in a USB disk

2. Turn on the speaker

3. Insert the USB disk, wait about 5-8 seconds, the speaker will upgrade and turn off auto (do not pull out U disk until you wait 5-8 seconds)

4. Pull out the USB disk, and turn on the speaker again

Remark:

1. the upgrade files usually will be "MVA" or "UPD" format, DO NOT change the name of the file.

2. the U disk must be less than 32G

3. DO NOT disturb the speaker when upgrading. (like pull out U disk, turn off the speaker, etc)

Please check the video: