I'll get the RS232 cable soon for MConfig.
Never used it before, so I expect some challenges.
Bought the HD621 used, who knows what kind of settings the previous owner used.

G61RSL, DSP7200, DSP5200HC
Lumin D2
Akai GX-620, Teac A-3300SX, Nakamichi CR-4A, CR-2A
Oppo BDP-103
Sony PS-X600, Nagaoka MP-110, Denon DL-103R
NuPrime STA-9, Elac BS 63
PS Audio PP10