Noise sample, Noctua NF-A12X25 PWM, 2 spacing distance, 4 PWM ratios, mounted on Fractal Design Meshify 2 Light TG front.

Spacing distances: 0mm, 25mm
PWM ratios: 25%, 50%, 75%, 100%

Microphone: Matastudio C10
Camera: STCOM FHD60F
PWM control: lich426's FanCtrl

This time, using the spacer designed by myself, the noise of a front intake fan significantly reduced by making ~25mm gap. But the current design is a bit hard to apply and takes up more inner space than Noctua's one.

I re-designed intake spacers for 120/140 fans and they have 5, 10, 15, 20 and 25mm gaps. Using Noctua NA-SAV3 anti-vibration pins is recommened! Check out STL files of spacers below:
[ Ссылка ]

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