4. The sound quality decreases a�er turning up the volume.
The power supply cannot drive the speaker. Please replace the power adapter with a
higher voltage.
5. The sound is not smooth a�er turning up the volume.
The low current of the power adapter makes the intermi�ent power failure protec�on
start. Please replace the power adapter with a higher current.
Or long-�me high-power output, the power amplifier board is overheated, and the
overheat protec�on of the power module is turned on. Turn down the volume or
increase its heat dissipa�on.
Fosi Audio designs and builds innova�ve audio products with all your music in mind.
Great sound, simple but elegant designs, high-quality materials, and truly useful
features are what Fosi Audio is about. We sincerely hope you get as much enjoyment
from our products as we’ve had to create them!
Our website: www.fosiaudio.com
Amazon store: www.amazon.com/fosiaudio
Our Youtube channel: Fosi Audio
Our Facebook page: Fosi Audio
Whatsapp: +86 17722625601
A�er-sale Service and Technical Support Email:
All Fosi Audio products have an 18-month limited warranty on parts and labor from the
date of purchase. Please contact us if you have any problems.
What Is Covered?
All defec�ve parts or faulty workmanship.
What Is Not Covered?
The warranty doesn't cover damage caused by accident, misuse, abuse, neglect,
excessive moisture, lightning, power surges, other acts of nature, unauthorized
product modifica�on or repairs, or failure to follow the instruc�ons outlined in this
guide.
Warranty Informa�on
About Fosi Audio
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