I have been reading many posts about the D4 being a really good bang for the buck.
But the battery life (9hours) is pretty low, won't make it through a longer plane ride...
I spot on the D2+ Boa, which uses the same TI PCM2706 Chip, does it mean,
the D2+ Boa will sound just as good as the D4 if I am not using the DAC(Line-in).
Did iBasso downgrade their Amp chip on the new D4?
By the way, this will be powering my Westone 4 using iPod Classic line out.