tube preamp and bass mgmt

iknow that many will find this question heretical,but are there any tube preamps with bass management ?if so,are any affordable?
What do you consider affordable?
$1500 give or take.used.
Don't have a pre with bass management, but do have speakers with bass management, Genesis, and don't know if i could get along without it now!!
Mowhoward in your view what is bass management;would it be like the bass management of a theta casa nova(user selectable crossover types,frequency and phase)?