The early version inverts, the later one doesn't. The later one has a little symbol ("D" if I remember rightly) under the display.
Remember, the SCD-1 is not a true balanced design. The balanced signal is created at the output stage. Unless you're running long cables there's no advantage to the balanced outs - in fact the single ended outs have less circuitry in the signal path.
Remember, the SCD-1 is not a true balanced design. The balanced signal is created at the output stage. Unless you're running long cables there's no advantage to the balanced outs - in fact the single ended outs have less circuitry in the signal path.