Fjn04, that is surely useful. Currently I have Harbeth and Marten and it is true they sound very different from each other. The Harbeth sounds great driven by the Naim pre power solid state amps (they sound soft and dull driven by 7 other amp combinations I tried). Nevertheless the Naim is not a good combination with the Marten as the sound is too spotlit, rough and unrefined.
The Marten and Kharma are quite similar in sonic character I believe, and I would suspect (and hope) that the Class A L-590AXII would be a better match to the Marten than the Naim and L-509X.
The Marten and Kharma are quite similar in sonic character I believe, and I would suspect (and hope) that the Class A L-590AXII would be a better match to the Marten than the Naim and L-509X.