Elrog 300B vs Takatsuki 300B tubes

Dracule1,
Just goes to show that no product ever gets complete unanimous positive opinions/impressions. Variables and individual ears won't allow it to be. Sorry they didn't work out for you as they have for most of us posting here. I know I've raved about them, that being my honest experience with Elrog.
Charles,

If it can somehow be ascertained, it would be interesting to know what grid and plate voltages the Lampi operates the 300B at. I wouldn't be surprised if those voltages were considerably lower than in the Franks or other 300B power amps, and if that difference was a major contributor to the Elrog's performance in Dracule's DAC.

Best regards,
-- Al

Hi Al,
Good point, but interestingly Wyan001 and Germanboxers use the same DAC with superb results. Could system synergy partially explain it?

System synergy is a possibility. I use a Tortuga Audio passive LDR preamp. May there's an impedance mismatch? Tortuga has a new software upgrade so you can vary the impedance of the preamp, which I don't have. May its time to upgrade and see if this will improve the sound.

I don't doubt the Elrog owners who heard improvements with this tube.

Dracule, This is odd. Your findings are so different from Wyan, who also had the opportunity to evaluate both the Elrogs and the Psvane 101D WE replicas. He had a strong preference for the Elrogs in his Lampi. I know the Psvanes from using them in my Coincident CSL, and they are very good tubes. Highly resolving with excellent tonality. It is possible you just like their sound better, or they do match your system better. I will say this, when my first set of Elrogs began to go bad, their sound was nothing special to say the least. I can't rule out that you have a couple tubes that are not up to snuff.