Why do I always like a source with Burr Brown DAC?

Jax2, could you please mention which are the two DACs you use with 1704 chips ?

In my main system I use a DAC built by Alex Dondysh of 3D-Audio (no longer DBA). He has not built many DACs on this board AFAIK, but it is called a DAC24. It is integrated into a dual-box Modwright 36.5 DM preamp and is a rather unique piece that Dan showed in the CA show last year. I believe Dan and Alex will be collaborating in the future.

The DAC in my office system is an Audio GD Reference 8 that uses 8 PCM 1704 chips in balanced. Kingwa was near the end of his supply of PCM1704 chips and there was some question as to whether and when he may be getting more in. He built his reputation on the DACs he designed using that chip, so I can't imagine that he'll not try to get more to build with. The drawback of the REF 7 & 8 are that they are quite large and heavy using substantial power supplies.

With both these DACs, and the strength I see in the 1704 chip when well done (and both these designs use them very well), is that they are tremendously revealing of detail and nuance while remaining entirely natural and musical. It seems to me that the trend with at least some DACs I've heard is to be ruthlessly revealing at the expense of musicality, which is not my favorite flavor. There are plenty of other designers who use that chip very well. With the takeover of delta-sigma technology I wonder how long TI will continue to produce the PCM1704. I know Kingwa was facing a minimum order of about 2000, and they are pretty expensive chips. Perhaps Alex P could chime in on that?

The CDPs that I have heard with BB chips are Bluenote Stibbert, Ayon CD2s, Audio Space (forgot the model number), Assemblage (Sonic Frontier), AMR CD77 (TD1541A) and a few more which I will have to recollect.

The typical delta sigma based CDPs I have encountered are the Rega, Arcam, Accuphase, Lampizator Level4 (AKM chip), Chord 64, Higher end Denon, Marantz SA11s1.

Perhaps Alex P could chime in on that?

TI site shows "production active" on both PCM1702 and PCM1704 DACs.

I am sorry to disappoint all mulitbit DAC lovers here but my opinion is different. I went through PCM56, PCM63, TDA1541, TDA1543, Ultra-Analog hybrid modules, PCM1702 and PCM1704 DACs. None of these satisfied my ear, regardless of the implementation. Please don't get me wrong; as we all know, it is possible designing very nice sounding audio gear with all of the above mentioned DACs. IME, it is actually much easier obtaining a nice rich sound with these DACs; maybe this is the reason why people like such designs so much.

IMO again, although nice sounding, none of the multibit DACs I’ve heard is capable of realistic top-end extension and air that is comparable to SOTA vinyl (for example). The other thing is that, to my ear, all PCM1702 and PCM1704 have this unnatural upper-midrange and top-end presentation that I can classify as "mechanical". Maybe people can’t hear it (or does not bother their ears), but to me this is an extremely annoying artifact.

Best,
Alex Peychev

Isnt Analog Device AD1865 also a multibit DAC ?

Alex, when I say I like the Burr Brown sound, I did not mean I liked only the 1704/1702 multibit DACs, I also like the 173X and 179X based DACs and CDPs. Typically Burr Brown has a tonality and that is what I always found most accurate...I agree there could be issues with Dynamic Range, Extension and other such specs but tonally they are so correct.