I have seen both the Define Mini and the Define R3 where the concept was to deliver good airflow within the chassis while keeping all of the noises in there as well. To do this Fractal Design uses a combination of dense open celled foam behind the bezel while the side panels use a blend of cloth and fibers blended to absorb sounds that other panels allow to pass right through. One feature I really liked was the ability to add fans in the top and sides of these chassis. Beyond that, for those that don't want an extra ventilated build, the ModuVent panels can be used to plug the sound leaks. That along with hard drive trays, black interiors with all black wiring, the accents of white on the trays fans and expansion slots, I mean the list goes on and on for the feature set.



Link: Tweaktown