Yes – some of our Scarlatti and Paganini customers have done this. The Vivaldi DAC is the star of the show, it makes the largest improvement. The other units also contribute substantial improvements, as well as extra functionality.
Vivaldi units do not have 1394 interfaces, so we have updated the Scarlatti & Paganini software to add the same Dual AES DSD interfaces used by Vivaldi. Note that the Scarlatti & Paganini units do not have multiple word clock inputs, so you will have to take the extra care over the setup of clocking.
Sorry, we cannot do the same with the Classic products.