iPod Classic 160gb (2nd rev) > iBasso D4 "Mamba" > VSonic GR07
I approve of the combo's synergy and performance. VSonic really needed a boost from the D4 Mamba (even if easy to drive). iPod headphone out jack is absolutely terrible - flattens soundstage, bass rolloff, slightly harsh highs with little detail anyways. D4 brings out the warmer lows and a MUCH more articulate, sweet treble. Mids are slightly less in quantity compared to the iPod.
Great value combo for the money.