Why would it sound different? Maybe a tiny bit louder or more in control, but it should sound as close as possible to the source.
Speakers - capable of changing sound the most because, well, they physically produce what your ear hears!
Amplifier - they have to drive the speakers, so they can affect the sound by how accurately they drive the speakers and how well they control speaker movement without distortion.
Source - unless you use built-in equalizers to actively change what the sound sounds like, the source should just pass the audio along.