In the beginning of 2008 we introduce three different passive subwoofer boxes. The boxes are same as the active boxes ASB110, ASB120 and ASB212 but without amplifiers. The new boxes are called BB110, a 23 litre enclosure with a KW10 sub, BB120, a 44 litre enclosure with 2 x KW10 subs, and BB212 which is a 28 litre enclosure with a RW12, 12" sub.