Meanings of sweet power in English

It was a voice well worthy of cultivation, excellent in compass, with rare sweet power.

We have known this sweet power over the affections of others to be possessed by very worthy and by very barren natures.

Our Melbourne Red Metallic test car carries a 320-horsepower twin-turbo in-line six-cylinder engine whose sweet power delivery is complemented by the red rocket's blare.

His mother had such sweet power of sympathy, that she would draw the sting out of the girl's heart when she had her alone.

Oh, all ye sweet powers of air, now hug me close!