I find that a Bendix 5852 Redbank manufacture is the primo rectifier in the ANK DAC. Just more of everything compared to the tube supplied with the kit. And I run Philips JAN 5687WE's, too.
I hate to say it, but the Lampi Pacific is quite a bit better than the ANK DAC - - I don't know how to characterize these things as percentages. I've gone up the chain of Big 7, Golden Gate, and finally Pacific, and even the Big 7 clearly offers more information while staying very musical. The others just get better and better. That said, I have kept the ANK for my second system, rather than move the Big 7 into it, so that says something about value for the ANK.
I hate to say it, but the Lampi Pacific is quite a bit better than the ANK DAC - - I don't know how to characterize these things as percentages. I've gone up the chain of Big 7, Golden Gate, and finally Pacific, and even the Big 7 clearly offers more information while staying very musical. The others just get better and better. That said, I have kept the ANK for my second system, rather than move the Big 7 into it, so that says something about value for the ANK.