The 568 doesn't have an IEC filter either. Just a transformer with multiple taps and separate regulation on every board. The way most highend products should be. Heck in my old Wadia DAC the transformer was in its own metal case inside the chassis. Great pains were taken to separate AC power from the electronics. As I said earlier since I separated my 598 AC power from my 568 AC power the sound quality jumped up quite a bit. A lot smoother with more image depth. Like I'm in a larger room! I'm pissed at myself for never separating them earlier.

Ron

HT: 568.2mm (Revelation One filter), 518x2, SB3, Bryston 7BSTx3, 8BST, Aerial 10T, CC3, SW12(Qty2) w/SVS AS-EQ1, MK Tripole x4. JVC RS1u, DVDO Duo, Oppo 103 w/Vanity103HD, Sony PS3, VIP 3D Theatre, Acer H5360. Logitech Ultimate Remote and Hub.