I've talked to @1markr a bit via pm, but wondering if anyone else has tried tube rolling in this dac. He recommended orange globe label Amperex JAN 7308s and Holland Philips SQ Miniwatt E188CCs, but not Amperex 6922 PQs. I accidentally bought the latter (pinched waste I think) for my trial period. At least I'll get to try them vs stock.
And for people considering the miflex. I had them on the outputs of my Don Sachs pre and didn't like them as much as he did. Good tonality, but flat and 2 dimensional. I replaced them with Mundorf Supremes and prefer the later. A lot more layering to the sound. Haven't tried them in the pre, but I do have duelund tinned copper casts on my speaker crossovers and love them. I doubt miflex would beat them there (Jupiters were quite a few steps back).
And for people considering the miflex. I had them on the outputs of my Don Sachs pre and didn't like them as much as he did. Good tonality, but flat and 2 dimensional. I replaced them with Mundorf Supremes and prefer the later. A lot more layering to the sound. Haven't tried them in the pre, but I do have duelund tinned copper casts on my speaker crossovers and love them. I doubt miflex would beat them there (Jupiters were quite a few steps back).