Noctua recently released their NF-A14 PWM fans which uses AAO (Advance Acoustic Optimization) frame which essentially uses integrated anti-vibration pads and their proprietary stepped inlet design and inner surface microstructures, as seen on the reviews before.
This model succeeds NF-P14 fans. Noctua designed these fans which can up to the top speed of 1500RPMs with their PWM control with the above features specifically made for Radiators for Water Coolers, Air coolers and to be used for case fans. Noctua still to their NE-FD1 PWM IC chip and their proprietary SSO2 bearing which has made a good impression in the last. The fan runs on 1200RPM with the low noise adapter, and the minimum it can do on PWM mode is 300 RPM, so you’re getting a good range for low and high RPMs.
The illustration below shows how the frame is designed:
The specifications are as follows:
As usual, Noctua bundles with low noise adapter, 4 pin Y cable, a very helpful 30 cm extension cable 4 sets of fan screws and vibration compensators.
As always appreciated, Noctua always gives 6 years of warranty on their fans.