David, as I understand it, the upgrades for the X-01 LE are:
1. The RCA output jacks are now WBT jacks
2. The Digital output jack is now WBT
3. Internal wiring has been changed from Van den Hul silver wiring to Acrolink 6N copper wiring - same as used in the P01/D01 top of the line Esoteric combo
4. Changes to the connectors, capacitors and resistors in the output stage to the ones that are also used in the P01/D01.
5. An improved stock power cord based on Acrolink copper wire - same as the one used in the P01/D01.
I do not know if the D03/P03 is multichannel or not.
1. The RCA output jacks are now WBT jacks
2. The Digital output jack is now WBT
3. Internal wiring has been changed from Van den Hul silver wiring to Acrolink 6N copper wiring - same as used in the P01/D01 top of the line Esoteric combo
4. Changes to the connectors, capacitors and resistors in the output stage to the ones that are also used in the P01/D01.
5. An improved stock power cord based on Acrolink copper wire - same as the one used in the P01/D01.
I do not know if the D03/P03 is multichannel or not.