Headphone output: balanced Connection: 4.4mm, 3.5mm x 2, XLR4/unbalanced Connection: 6.3mm, 3.5mm, headphone input: Walkman/Xperia portable to charge Walkman)/USB Da hybrid amplifier circuit for a sensitive and natural sound, DSD remastering engine converts all PCM source to DSD 11.2MHz, DC phase linearizer simulates the phase character of an analog amplifier Acoustically tuned panel eliminates unnecessary resonance for sound, fbw chassis (frame, Beam and wall structure) provides rigid structure, eccentricity Insulator prevents mechanical resonance