Hi,   I'm picking up my PSB mu4 2's (what an awful name) today and I'm looking at upgrading my table top usb DAC/AMP. I'd like it to be a substantial upgrade (semi at least). My financial limit is the $249 dragonfly, which I considered, but I'd prefer a physical volume control and I'd also...

Hi, I wanted to ask if anyone has tried the iBasso D4 or the Meier 3move with a pair of Sennheiser HD-380's? If so, what did you make of the combo? I already own the phones and consider getting a portable dac/amp (leaning towards the D4). I would also use this to drive a pair of Goldring...