However, woefully underpowered amplifier somewhat improved with balanced output.

The Walkman is superior in every way to the Astell AK320.But apparently the Astell team succeeded to design the perfect mobile amplifier

However, woefully underpowered amplifier somewhat improved with balanced output.

Give you a portable DAC/AMP combo that sounds as good as or better than the latest combo offerings from those audiophile heavyweights like Musical Fidelity, NAD, Schiit, etc, etc