The Bluetooth speaker used in this example is a “ Rugged Portable Bluetooth Speaker ” sold by North American electronics retailer Best Buy under one of their house brands. A search of its FCC ...

IC3 is a TDA2822D Audio Amplifier by STMicroelectronics, whose output is sent to both the 6.3 mm L and R female mono output jacks and to the headphone 3.5 mm stereo output jack on the rear side of the ...

Bluetooth Audio Amplifier Module (Fosi Audio) The hack here involves fitting the speaker cabinet with new “guts” in the form of a wireless stereo 2×50 watt digital amplifier [Dave] found ...