The fact that it has a tad ... more bass fullness, richness and power in the mid to upper bass is only a part of overall experience and does tend to reveal its vacuum tube heritage. The audibly extended high frequency response has its own attraction at the same time being silky smooth and sweet while revealing even more inner detail. That is a really tough balancing act for an audio designer to successfully accomplish.Sounds very consistent with the sonic traits you indicated you are looking for.
Good luck. Regards,
-- Al