Everything is pointing to the V30 coming with a dedicated DAC. Hopefully they don't gimp it by limiting it to certain geographical locations.DACs have been in phones for a while - V10 had a good combo that was an improvement of the G4's; HTC's Boom sound wasn't just the front facing speakers; Xperia Z3 had very good audio too. What made the V20 special is that is has BOTH a high quality DAC + a powerful amp. HTC 10 is very good with both and the V20 just crushes it, with the Axon 7 firmly right behind it. The G6+ could be in this discussion, but it's limited access right now - although if you got to the right websites, you can buy one.
Audophiles and people like me who like good portable music have been around for eons. It would be a shame if the V30 doesn't continue this tradition.