Thermaltake Sonic Tower
Huge: Thermaltake's Sonic Tower
The second cooler from Thermaltake is the Sonic Tower. What's special about this cooler is that passive operation is theoretically possible. An optional 120 mm fan can be attached to the cooler, but while the mounting hardware is enclosed, the fan is not.
The Sonic Tower wows you with its size. At a full six inches in height (15 cm,) it could be a tight fit in some cases. For comparison, the width of a 5.25" drive is only 5.8" (14.7 cm.) It isn't as sweeping as the Big Typhoon, however.