...which it turns to oxidized green (close to connectors area) after a few months.

The SMC connector is very prone to "rotational torque" as a result from the rigidness / stiffness of the cable. If the latter is flexible (i.e. multi-strand copper with soft insulation) there is no problem.

Never use such connectors.   Especially when driving HE-6 from a FirstWatt-type amplifier.   An accidental pull of the cable could extract the connector from the headphone and could short (damage) the output stage of the amplifier!   The best connector is the Hifiman screw type with a...

p-p Voltage > peak W, not rms!

...Which means 14.5 V rms max. output voltage that cannot completely drive the HE-6 to its limits. Right?

What's the max. power that can be applied to the HE-6 when driven by a 25 W (@ 8 ohm) FirstWatt F5?

IMO, the difference is in the output voltage not current.   Hugo suits especially well with sensitive headphones requiring no more than 2 to 3 V.   These include the low-impedance IEMs and some 50 ohm planarmagnetics.

Guys, any experience with Raspberry Pi2 (running Moode or other Linux distro)? Does Intona work?   My current setup is: Raspberry > Wyrd > Chord Hugo.

No. Hugo has only RCA outputs.   Correct me if I'm wrong, but Mr. Rob says that balanced design imposes double the number of components in the signal path, which means more distortion.

Think Tidal as a huge library of music files for online streaming or for offline reproduction through local storage (for music on the go without data connection).   But everything stops (both online and offline service) when subscription expires. Offline content is also useless.   And what...

Is Intona verified to work in all resolutions, up to 384 KHz, and DSD?

Exactly the same.

I'm almost sure it has to do with the settings from software player side.

Finder X1 owner here. Phones are partnered with Chord Hugo.   Very impressive sonic results, and especially in tranparency field (my reference pair is a modded Hifiman HE-6 on a Firstwatt F5).   Bass is very good as well as dynamics.   Mids are a little distant sounding and with less body...

But what about the tap count in Mojo (with respect to Hugo)?   Will we ever have an answer on that?   Mr. Rob?