It looks like Dan did for six channels what
the Morrison ELAD did for two: design a just-the-essentials analog preamp with the best theoretical performance you can wring out of it, pay no heed to 'phile fetishes, and don't worry about it being pretty*. Not for everyone (including me), but for the few who need it or just dig the concept...
I think three ELADs would cost a tad less and do more or less the same thing, albeit less conveniently.
That precision six gang pot must cost a pretty penny by itself!
And this got me thinking of using shielded wire inside my DIY power amps and active crossovers when I build them (I just ordered Elliot Sound PCBs for his P3A amp). Gotta read Dan's grounding article in depth yet, too.
[*Kind of like my Subaru WRX, come to think of it!
]