In recent years built-in active electronics, such as the Bartolini TCTs, have been quite popular. Aguilar is highly esteemed because of it's sonic neutrality. (In other words, when compared to the passive sound, w/the tone knobs set on flat, the active sounds close. If that's the case, why not use an outboard eq (boss, mxr, etc.)? Other than the controls being at ones finger tips? Can one get comparable results?