A tube preamp combined with your Rotel amp could add a more organic presentation and a sense of realism.
However, the Prologue Premium preamp would not be a match with your amp.
The preamp's output impedance of 2800 ohms is too high for the Rotel's impedance of 36 kOhms. The impedance specs of this preamp makes it more suited to a tube amp.
You mentioned more air. If you mean better separation between instruments and more detail, then the power source of your system should be addressed by lowering the noise floor. eg, dedicated line of power conditioning.
However, the Prologue Premium preamp would not be a match with your amp.
The preamp's output impedance of 2800 ohms is too high for the Rotel's impedance of 36 kOhms. The impedance specs of this preamp makes it more suited to a tube amp.
You mentioned more air. If you mean better separation between instruments and more detail, then the power source of your system should be addressed by lowering the noise floor. eg, dedicated line of power conditioning.