The DI had both BNC
and RCA coaxial outputs can connect to two DACs at same time.
The both version DI has built in 3 groups class A PSUs can work well by USB
power supply . The external power supply only for upgrade, not
The DI-PSU (new) have different than the old Digital Interface
extern PSU, the DI-PSU (new) offer 450mA at 7.5VDC.
What's benefit of the coaxial input:
The coaxial input can improve on SQ
from some low/mid rang coaxial output source. Like some DVD player, PC
sound card, low/mid rang CDP like the Marantz CD67, ect. If the coaxial
output source already quite Hi-end, don't expect the DI
can improve on SQ.