So far I used a 12V supply with the Hifiberry Amp+, which worked fine.
Over the weekend, the Raspberry/Hifiberry replaced a Zeppelin Mini in my home office, because it sounds a lot better. Now I have an extra 16V power supply that I can use. It works fine, and seems to produce the exact same volume level than the 12V supply.
Is there any reason to prefer one over the other? E.g. is 12V more power efficient than 16V? Does the 16V burn off more heat?
The 16V can deliver 3.2A on 16V, and the 12V 3A, so the 16V is roughly 40% stronger.
Power supply voltage: Does it matter?