The Marco-boy main system, as of August 2020

[Marco]

I use both Dueland and Jupiter copper foil output caps in the output stage of my DAC.

.47 uF Dueland versus 2.2uF Jupiter.

The Jupiter's sound better generally. Smoother and warmer. The Dueland's appear more accurate and possibly a smidge faster.

That might purely be due to capacitance values rather than actual real differences in construction. The capacitance value of the Jupiter's means better bass extension, which may account for the marginal, and I do mean marginal perception of warmth.

That said the character traits of a few of the triodes I use in that output stage work better with the Duelands. But they are in the minority.

As bypass caps some pussy (non man like, small) value of either will probably be fine.

Thanks, Justers, that's also very useful info

Marco.