Meridian's DACs were usually assigned a number such as 606, 563 and 818. And now there is the Ultra DAC. Purely on appearance it is hard to see the differences with the 818 but soundwise it is immediately clear that this DAC deserves more than just another number.
For the first time, there are a pair of active Meridian DSP speakers in my listening room, along with an 818v3 Reference Audio Core and a Media Core 200. This makes for some very interesting comparisons.