"I would describe it as a slight lack of focus and dynamics.* This has happened through many changes of all components."
I've had similar issue in the past. Check your incoming ac voltage, usually a drop would result as such*. Whereas, an increase could have it sounding too controlled and pinched. Get a power conditioner incorporating stabilizer, or, if separately, a good stabilizer along with your conditioner. I've learnt it's not so much about ac quality in this case, but more likely the irregularities of it being the culprit.
I've had similar issue in the past. Check your incoming ac voltage, usually a drop would result as such*. Whereas, an increase could have it sounding too controlled and pinched. Get a power conditioner incorporating stabilizer, or, if separately, a good stabilizer along with your conditioner. I've learnt it's not so much about ac quality in this case, but more likely the irregularities of it being the culprit.