Wow. I happen to agree with Rob on the interface.

Quote:
Many headphones and some powered speakers interface with the computer through a USB port so audio remains digital until it hits the output transducers ... [edit] ... But I'm not convinced an audio interface offers any enhanced capability for audio playback.


It can't remain digital forever, somewhere it is getting converted to audio in order for us to 'hear' it. The headphones/speakers need a Digital to Audio conversion somewhere in the chain. If it happens in the speakers, it is bypassing the internal audio D/A convertors, so totally sidesteps whether the internal one is any good.

To me, your post includes using a different USB device as a solution (an interface, if you will) that is separate from the internal audio chip for audio.
Yet you're 'not convinced' using a separate device makes any difference.
It is the Digital to Audio conversion (D/A convertors) that make much of the difference. If it avoids the internal D/A conversion it is not a fair comparison.

Make your sound your own!
.. I do not work here, but the benefits are still awesome