Datasheet

The speakers can be 4 to 8 ohm impedance, 20W maximum power. Since it is a class D amplifier, the signal out of

these speaker blocks is a high frequency (~300KHz) PWM square wave. The inductance of the speaker smooths out

this signal into audio frequencies of 20-20KHz.

The outputs are Bridge-Tied-Load which means you can only connect speakers up directly. Don't connect the outputs

to another amplifier! And you can't "parallel" the two BTL outputs for one 40W load either.

To connect up the speakers you'll want to solder in the terminal blocks, see the Assembly section for details

Breakouts

At the very bottom, we break out all the pins you're likely to use with this amplifier. If you're using the amp in Analog

Mode you don't need to connect to any of these, most likely. If you're using the amp in Digital Mode, you may want to

connect to some of them. See the tutorials for each section on how to use the board in either mode.

Above the pinouts there are three solder jumpers (Analog / AD1 / AD2) and then on the left, a 3-pin breakout called

Pot. Vol - these are used in analog mode, the solder jumpers are closed to tell the chip we'll be using a potentiometer

to set the volume. The Pot Vol connection is how we wire up the 1K potentiometer. This is covered in more detail in the

Analog Wiring section.