Aliases are created during A/D conversion if there is energy above Nyquist. This process is irreversible. During D/A conversion there is no aliases, as there is no energy above Nyquist, so nothing to be aliased.
NOS DAC create images. Images do not affect sound in the acoustic band as long your downstream channel is free of distortions. Distorted images leak to the audio band, then is a problem.
Images are continuously filtered out on the downstream equipment, so on speakers where distortions are big, do not play significant role. In fact, most of NOS DACs do not have high order analogue low pass filter. But a quality of your amplification is important (distortion free up to 100kHz), no question about.