strange that. the other pedals that were rehoused like the DMM and Micro-Synth had their required voltage reduced from 24V to 9V when they got the XO treatment, so kinda odd that the freq analyzer would need 40, since the trapezoid enclosure version needed 40 too. there must be a computer in there :S
ehx has been known to screw around with power though... there were theories that the dmm and new bms had their voltages stepped up internally
but even at 9v, ehx pedal (especially new ones) had alot of annoying limitations, such as reverse polarity, non-boss style jacks, cannot daisy chain etc etc