Phat beat - speaker gets hot

Hello, Strange noise is coming out of my piradio and the speaker gets really hot after while. Can you please help to to fix it? Thanks.

hello, did it ever work correctly ,or is it first time using it [new]

first time, but got already the 3rd board. first - no sound. second - no power switch and now this.
update: it works with pi2 but not with pi0/w

weird ,not sure, are u using the same power supply for both pi’s ,mine worked great and still does after 2 years …