NF-B9 redux fans look similar to their larger brethren, the NF-S12B redux. But there are differences. While the notches can be found on a number of fans, the beveled ends hold a certain fascination.
Noctua sold the 1600 rpm NF-B9 for a long time before they upgraded to a PWM fan. Even after they began selling the NF-A9x14, the shape of the NF-B9 has remained unchanged.
Noctua says this about their NF-B9:
For their redux editions, Noctua adds this:
The NF-B9, PWM or Voltage-controlled, standard retail or redux, has a static pressure of 1.61 mm H2O at 1600 rpm. Other specs are to be found in the Results graph later in this review.
Noctua sold the 1600 rpm NF-B9 for a long time before they upgraded to a PWM fan. Even after they began selling the NF-A9x14, the shape of the NF-B9 has remained unchanged.
Noctua says this about their NF-B9:
The NF-B9's highly-optimised blade design achieves an exceptional level of airflow and static pressure that most other fans can only reach at much higher speeds. Bevelled blade tips, Vortex-Control Notches as well as Noctua's SCD drive system and premium-grade SSO-Bearing ensure outstanding quietness and long-term stability.
For their redux editions, Noctua adds this:
The classic NF-B9 is a long-standing favourite among enthusiast users around the world . . . The new redux edition reissues this award-winning model in a streamlined, accessibly priced package that has been reduced to the essential core: the NF-B9 premium fan.
The NF-B9, PWM or Voltage-controlled, standard retail or redux, has a static pressure of 1.61 mm H2O at 1600 rpm. Other specs are to be found in the Results graph later in this review.