How do I connect differential input amp to Arduino DAC?

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i wanting connect 100w mono audio amplifier dac of arduino. amplifier uses tpa3116d2 chip  (http://www.ti.com/lit/ds/symlink/tpa3116d2.pdf) has differential input.

the data sheet explains connecting 2 thus:

quote
to use tpa31xxd2 family single-ended source, ac ground negative input through capacitor equal in value input capacitor on positive , apply audio source either input. in single-ended input application, unused input should ac grounded @ audio source instead of @ device input best noise performance.
this isn't clear me.

is attached circuit diagram mean?

the other way around.

the ground can located  @ arduino amp's negative input should grounded through  capacitor, not directly connected ground.


and...  100w amplifier, i'd recommend volume-control pot, during development/experimentation phase.    plus, might want lower power supply voltage amp and/or put resistor in series speaker keep power down reasonable levels.   you don't want 100w "pop" when connect or when power-on, etc.


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