Even the most common studio monitors are the active ones, which do not need amplifiers, crossovers or other equipment, the passive studio monitors remain popular because of their modular designs and the ability to easily upgrade your system, meaning that you can add new pieces of equipment that suits your needs. It will take you a lot of more space, but your setup will be more flexible.
1 - 12 from 12
Behringer 1C-BK Black (Unboxed) #933223
Passive Studio Monitor