It requires a return authorization from Meitner and shipment back to the factory. As previously noted, it’s a comprehensive parts upgrade:
"Next generation 16xDSD MDAC2™ DAC paired with the updated MDAT2™ DSP
Latest generation VControl™ volume system from the EMM Labs DV2i
Supports DSD128/2xDSD, DXD, and MQA®
New advanced network streamer for seamless music streaming integration."
The new streamer now supports DSD 128. I am about to ship mine to Meitner for the upgrade. Do those who have had the upgrade performed have any new impressions to share?