The Isobarik bass design enables them to go super low in the bass and having them somewhat close to the wall behind them also contributes to their deep bass response. Although the bass is deep it’s very well controlled and fast.
yes, they can be driven actively as well with 3 stereo amps ( or 6 mono amps) with an outboard electronic crossover made specifically for the 808 by Naim, Linn, Exposure and Kudos’s own crossover box.
I’ve read active takes them to the next level but they are superb passive as well.
They sound better though with 1 great amp in passive mode rather than 3 mediocre amps in active mode…plus with active you have more boxes, more cables, etc

