money4me247It rolls. The tube is a 12AU7, so you can roll with any compatible tube of that format. In the Massdrop office, we're all super impressed with this product. I've never seen anything remotely close to this price with dual-mono Wolfson WM8740s, or an XMOS USB chip, let alone both of them.
NyquistRateWith headphones plugged in, it's an input. Without headphones plugged in, it's an output.
I don't have enough experience with the two to tell you for sure, but the reviews previously linked in this thread call this amp warm.
"Sound is indeed lush, warm and thick, like what I expected for a headphone amplifier that has a tube vacuum tube."
"Alanis Morrissette - Perfect (16/44.1 flac): spacious and warm. her voice can be harsh at time but it's not the case here"
RyneWeissThanks, I was trying to understand his comment "the treble keep me off, not really a bad thing as I am more towards a treble head." Seems to contradict his following statement of "Sound is indeed lush, warm and thick, like what I expected for a headphone amplifier that has a tube vacuum tube." Just trying to figure out the sound sig of this DAC/amp.