The Allo Digione doesn't support USB output which you state you need, via coax/BNC it is fantastic though.

I use one of the 3m cords on Amazon with my HE-4XX, it's either NEOMUSICA or New Fantasia, works just fine.

As a stand-alone solution, I agree with the comments about volume levels and channel imbalance. In my opinion/experience using a volume control prior to the A-100 solves both of these as the A-100 volume knob can be set high enough in its range to overcome the imbalance issues at the low end of...

Emotiva BasX A-100 is my amp (fed by a TA-100 DAC/Preamp), the jumpers are installed. Definitely not overkill, especially if you know how to use the volume knob(s). I'm not sure I would characterize the 6XX as easy to drive at 300 ohms, I think of "easy to drive" as something I can plug into a...

Just received my 6XX's this morning from Massdrop and have a bit of music playing through them now. Definitely a different sound that my 4XX's, which is not a bad thing. Plenty of power on tap to drive them, I didn't move the volume knob on my amp from where it was for the 4XX and it doesn't...

Sota Star Sapphire, Audiomods Series 5 arm, Ortofon Cadenza Blue cartridge. Phono stage is a Rothwell SUT feeding the MM phono stage of my preamp. Tried to post a picture, but I might not be able to...

I use an Emotiva Bas-X A-100 (in high power mode) to drive my HE-4XX's. A great combination, although I've not tried them with another headphone amp.

Hello all - my name is Mike, from North Carolina. Been at the two channel game for quite awhile, tried a set of Sennheiser HD598SR with a Schitt Magni 3 last year and it wasn't my cup of tea. Fast forward to the end of the year and I picked up a set of HE4XX from Massdrop. Driving them with...