The ART D-I/O DAC that was hugely popular a couple of years ago had a very high output. I think it was possibly even more than 5 volts. There were lots of mods performed on these too.
Monarchy audio 22A/B/C. It has internal jumpers to configure for low or high output voltage. The high setting is very high. I use the low setting to give better volume control on my preamp. It's a pretty nice DAC, too, provided it's fed a low jitter signal.
Hi, I've personally found, and many other here have also mentioned too, that the California Audio Labs (CAL Alpha DAC thows a quite hot output signal.
Factory rated at 3.5V, some have said it's closer to actually being 4V. A $1450 Tube DAC when it sold new (2-12AX7A) they can be had for around $400-$500. I pair $450 for my mint Alpha right here. Mark
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