The amp is 50 watt class-D and I would think that Wadia would put some protection circuit in there. The volume is in the digital domain, so the higher the number - the better the theoretical resolution, given that you don't clip it by going too loud on hungry loudspeakers.
wadia 151 dac/amp
i bought one and changed speakers. i have to use around 60 on the volume scale to reach sometimes the loudness that i want . does anyone out there have one and know anything about using the amp at such a strong output for and hour or so of listening time...how it is protected, the amp that is, any info would be appreciated due to no info from wadia in paperwork..thanks