If you require a tube preamp, I recommend an Atmasphere MP-1 or MP-3, depending upon your budget.
The former gives my Ayre KX-R a run for the money.
@OP,
If you could accept a SS preamp, then the Ayre KX-R would be my choice.
Bob
The former gives my Ayre KX-R a run for the money.
@OP,
If you could accept a SS preamp, then the Ayre KX-R would be my choice.
Bob