Problem with max volume

I have a problem with my radio. When I am setting up to 100% of volume radio is restarting.
Where I can find a problem?

Another quastion: I noticed stereo mode is not working. When I am changing left and right channel both speakers are playing. (Jumpers are on the top and middle row)

Board: Up2Stream Amp V4
Firmware 4.6.337862.29

2x Dayton Audio TD20F-4 3/4" Soft Dome Neodymium Tweeter 4 Ohm
2x Dayton Audio TCP115-4 4" Treated Paper Cone Woofer

Adapter: 24V/4.16A EU

Nice radio :slight_smile:

Should be power adapter protected, because the AMP V4 with 4 Ohm load, the maximum power exceed 100W. But the power supply is only 100W. You could limit the max volume in new firmware version in WEB UI. It would be released soon.

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150 W or 300W adapter will solve the problem?

might be ok, but the device is designed with 100W, the heat sink might be a problem if you raise the power, and this also will cause AMP protection. For 4Ohm load, a 21V power supply is suggested.