T7498 4ohm

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I wonder what would happen if I would connect 4 ohms speakers and 35v supply. Would it burn down or something?

Do you mean the TDA7498 by ST ?
It may depend on the components values on the filter. I run one into 4 ohms at 24V supply without problems.

Get the datasheet and check the 35V is OK for the chip, it will have overheat protection anyway so I doubt you'll damage it.
 
Replaced with new board, its seems to have much less hiss and no pop sound when turned on. First I was thinkin it wasnt connected properly :p
 

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