The A/D/A for the Tact 2.0 is nothing special. It's not competitive with the quality of systems that really benefit from the RCS process. I use an MSB Platinum DAC with the 2.0. The A/D/A in the Tact 2.2 is reputed to be a major advance for their product.
If you're really interested in the intricacies of Tact products, then check out there use group forum:
http://groups.yahoo.com/group/TacTAudioUsersGroup
If you're really interested in the intricacies of Tact products, then check out there use group forum:
http://groups.yahoo.com/group/TacTAudioUsersGroup