I have not heard A19/28 but did hear their discontinued model A32 with Triangle speakers for my RX6 as the dealer did not have MA speakers. I felt it had a very lazy laid back signature and, imho, not suitable for high energy music like rock, hip hop or bollywood. It would be nice for vocal music though. I also heard Cayin AT-88 tube amp and it sounded far better than the Arcam for both vocals and tonality. I think an FM jagdish_p from hyderabad has arcam amp. You can get his opinion.