We switched carriers and I took a gamble on the V40. It's no doubt a better phone in every way, except audio.
The bass is leaner, the treble is more rolled off, and the mids are a little more recessed. Overall, it doesn't have the same drive and energy as the V30. Whats more disappointing is it has less power. I have to kick it into high impedance to get what I did in auxiliary on the V30. It will drive my 58X, but I need full volume.
I'm using Neutron as I did on my V30. The volume works in 7 steps a click with this player. With the V30 and 58X, 87 was plenty loud. I need the full 100 now. So the power difference isn't huge, but it's definitely noticeable. Does anyone know what the power output is on the V40?
I wrote down all my EQ settings from my V30 for each seperate headphone, and set them as such on my V40, so I know the sonic differences aren't in my head. I still have the V30 as I have to return it to the former provider, so I did about 3 hours of A and B testing last night. I will say that the sonic background on the V40 is darker, and that tiny bit of grain from the V30 is gone, but that's the only improvement I can hear. Less bass impact, rolled off treble, somewhat recessed mids and less power is what you can expect. I don't like the different placement of the headphone jack, and the DTS 3D surround sound is worthless with headphones.
Again, everything else about it is better. Display, camera, snappiness, etc. I have 10 days to exchange it, so I might get the V30 back. It's quite the dilemma for me, because I just picked up an Opus #1s, and it's sonically better than both phones. So I don't really need the better audio from the V30, but I miss it already. If I choose to keep the V40 it will be for better media quality, as I love to binge watch shows.
Unless I'm missing something, you still can't choose auxiliary or high impedance with easy to drive cans without having to force or trick the device.
Don't get me wrong, the V40 sounds nice, and still is better than most entry level daps, but if it will be your main source for music and you are coming from the V30, I'm pretty sure you will be disappointed. Now I have to decide what I want to do, and what's of more importance to me.
My co worker just got the note 9, and it's sonic traits aren't far behind the V40.