XtremeMac has announced a National Association of Broadcasters (NAB) show special for its Xrack and XtroVERT products. The company will ship products purchased directly from XtremeMac through May 31 free to any location in the continental U.S. The $1,799 Xrack is a noise reduction enclosure specifically designed for Apple’s Xserve and Xserve RAID. The $299 XtroVERT is a vertical enclosure for Apple’s Xserve RAID.