What the Best Dac have you heard or owned. How could you tell it was that good.

I haven’t spent a ton of money on DAC’s. So I know there’s really good ones above my price point. But I bought a Black Ice tube DAC at $900. Replaced the power chord with a Pine Tree iso-braid power cable, and the game changer for me was purchasing 2 NOS Amperex Bugle Boys (12ax7) for the output tubes. I’ve got the magic of tubes along with many other superlatives. I’m good for now! 

I have the WYRED4sound 10th anniversary DAC I bought it because one of the reviewers put it up against his VPI turntable with a $5,000 Japanese cartridge and he said the 10th anniversary DAC was every bit as analog, on that review I bought it and I wholeheartedly agree this is the most analog DAC I've had in my system, one of the other reviewers put it up against his$9,000 COS1 DAC and he said the 10th anniversary DAC was better and then he put it up against Bricasti, chord and other more expensive d a c s and he said the 10th anniversary DAC was better, and they also give you a 30-day trial period if you don't like it send it back and get your money back can't beat that, after you hear this one you won't be needing $30,000 DACS.

After years with the built-in DAC in our tube Jolida JD100 CD player and decades with our Quad amp/pre-amp, we bought an Audio Note Cobra tube integrated and started using its DAC with the same Jolida tube player. Light years in difference in detail! We then splurged and purchased an AudioNote CD 3.1x/II player with its built in DAC. Again, light years ahead of the DAC in the Audio Note integrated amp, and got bonuses of tighter bass, specific sound stage placements of instruments, and amazing sound at low volume. We could A/B every stage with our Quad ESL-57s, and the differences were dramatic. We are now set. I can't imagine any better.

Very subjective. 

The Weiss Dac 501 is excellent. So are all their products. The minute it was on was a wow. (The 501 is also a Roon endpoint.) That's how I knew.. or was the streamer or something else?

The Grimm MU2 (I have not heard yet) looks to be an excellent one box solution. 

For the kind of money needed to acquire upper DAC's and streamers for a fraction of the cost room treatment and vibration control would be more revealing. Then the DAC, streamer or sound would make yah quake.