This is a very capable end game headphone amplifier, capable of powering your most demanding headphones. 9 watts of class A power (@ 40 ohm) True Mono design 5 inputs, lots of options Four-channel 100 steps digitally controlled relay-based volume control Big Blue LED’s Big black box that weighs in at about 36 lbs Large brushed aluminum volume knob “The Remote” is the nicest piece of milled aluminum with soft clicky buttons you ever saw (or felt). Very powerful amp for your large (or small) high ohm dynamic driver or planer magnetic headphones. Doubles as a preamp, Cool! This unit shipped from Audio-gd in Jan 2019 Cover was off during these pictures, it is back in place. I am second owner. $1100, might consider trades.