I can fathom the Phantom – It's iFi Audio's new iCAN Phantom [~£3.7K], a drive-all headphone amp with 4.4mm/XLR4 and twin XLR3 balanced outputs for standard headphones plus two for e-stats. One of them features customizable bias voltage from 500 – 640V via six plug'n'play SD-style cards. The circuit itself is dual differential, features twin switchable tubes to change pure solid-state flavor, comes with a remote and 1:3 XLR:RCA inputs and outputs on XLR/RCA. The round top layers disguise air vents. What looks like two chassis is in fact one unit with silver and black halves here sitting atop iFi's best DAC.