The first problem we noticed was a sense of thickening and congestion in the lower midrange. This alleviated the problem, albeit only slightly. Different stands, interconnect and speaker cables were also tried, with similar results. We were assured that the amp was fully run in and the sound stayed the same after several weeks of continual usage. It has that euphonic softening which creates the 'nice' sound which many listeners prefer, but to my ears it falls short of achieving the goal of true high fidelity.
Reliability is also an issue here.
On the plus side, build quality on the outside is very good, close to being first-rate. You have been warned. Very clean sound, excellent with vocals and folk music. Bass is weak even with sensitive speakers. Try before you buy is a must.