I spent 20 hours listening to Marten Parker Trio with Luxman L509x, DartZeel LHC208, Hegel H390 and the sound was disappointing to the point that I suspect something is wrong with the demo pair. All electronics and speakers were fully broken in.
While low end had great resolution and slam, midrange and upper region were recessed making speaker sound veiled, dark and far from engaging. Room was large and live - it became apparent these puppies require power.
Another MAJOR issue in my eyes, is that Marten is much more expensive in US than in Europe that makes them a poor choice for North American buyers.