Silverstone AP Series Air Penetrator Case Fan Review @ Hi Tech Legion
 

Silverstone AP Series (Air Penetrator) fans do exactly what the name implies. Silverstone AP Series fans use air channeling design to direct the flow of air in a cylindrical pattern, making for far more efficient use of the fan’s airflow. With this air channeling, Silverstone AP Series fans can be aimed directly at the area requiring air and cooling more effectively while still keeping fan noise at a minimum. The lineup features the AP121/121L 120mm, AP141 140mm, AP181 180mm and the monster AP182 2000rpm 170cfm 180mm. The AP121L adds LED to the AP121, and is available in red, green, blue and white for those looking to add a little bling to their build in a 1500rpm fan. The AP121 and 141 include three speed cable for 700~1500rpm operation and feature fluid dynamic bearings.

http://www.hitechlegion.com/reviews/...rstone-ap-fans