The stage 1 tuning includes the revision of the input board for XLR & RCA as well as an extension and adjustment of the mains filter.
With stage 2 tuning, the MM8077 performs at such a high level that it will be difficult to find a multi-channel power amplifier with a comparable sound below €10000.
If desired, internal channels can be bridged to increase performance. This is particularly interesting with the MM8077 in a 5.1 setup.