I'm still left with my original question: Amp and DAC: Will I be able to hear a difference between (for example) the Schiit Modi2/Vali and my Macbook Pro's built in headphone output?
After some assurance here, I decided to go with what I had been feeling like doing all along, which was to get a Modi 2 and a Magni 2. Normal, not "U".
I've had both plugged in and playing for 2 or 3 hours now. While waiting to get the equipment, I've been wondering if I'll be able to hear any difference at all. Am I going to really hear anything different? I initially got no sound at all, even from the operating system and spent about 3 minutes working on that until I found the issue. The Power Switch. You have to turn on the power to the Magni.
The first song I heard wasn't familiar to me, so I switched over to my list of demo tracks: Songs I know sound good. I listened to "She's Gone" by Hall and Oates, which I previously picked because of the vocals being placed on the left and right. I thought it sounded kind of "flat" previously, but interesting because of the distinct vocals. This time it sounded very different. It now seemed to have some depth. It was also much more pleasant. I found myself listening until the very end, which I don't normally do with this song in "demo mode".
Moving on to other songs I thought the bass sounded better. It seems like the bass has tightened up, but it's hard to quantify that. Seems more controlled. The highs seem very different. It's odd because I now hear more details than I remember hearing before, BUT the highs don't sound harsh. The HP150s are kind of a bright headphone to start and they have a bit of a sharp, or biting character. Songs with lots of highs kind of hurt my ears sometimes. But now the highs just sound good. I was reminded of the highs I've heard at high end audio shops demoing expensive amplifiers, DACs and speakers. That separation of each instrument, and high frequency detail without any "ouch those highs hurt" feelings. Detail without harshness.
I'm trying to not be too dramatic here because I'm really, really surprised at how much difference I think I hear. The big deal for me is, I just keep listening to songs. You hear people say this from time to time, but this is new for me. I have a very long history with audio equipment and I've done a lot of demos at stores and in people's houses. I normally get ear fatigue after a short time and I want to either move to other songs, or just stop demoing. But with this setup, it just sounds GOOD. Less fatiguing than before and just better. ...and I keep listening. Again, I'm trying to not be too exaggerated here. It's quite a difference for *me*.
No, I did not do any back to back testing at ALL. My setup makes it kind of a lot of work to try to switch between the Yamaha mixer and the Schiit stack. The mixer is going into storage, as I don't think I need it at all right now. So I'm open to the idea that this is all, or mostly, in my head. But I don't think so. I DO KNOW that I'm really enjoying it!
Brian.