[bluPython]

It's mainly for use while watching tv and movies since my tv has no headphone jack. I'll probably also use it with my digital piano too.

Do you know if this headphone amp would sound better than the headphone jack on a typical receiver. Or the headphone jack on a basic set of computer speakers?

 

[Jnjy]

It's mainly for use while watching tv and movies since my tv has no headphone jack. I'll probably also use it with my digital piano too.

Do you know if this headphone amp would sound better than the headphone jack on a typical receiver. Or the headphone jack on a basic set of computer speakers?

Most likely yes, you'll notice the difference.
But you might want to have a look on the E11K instead.