Output Noise
I use a Class 1 Bruel & Kjaer 2270 G4 sound analyzer equipped with a Type 4955a microphone with a dBA-weighted dynamic range of below 6 dBA and up to 110 dBA. All tests are conducted inside a hemi-anechoic chamber with a noise floor close to 6 dBA and an ambient temperature of 25–28 °C. The test subject is placed a meter from the sound analyzer.
Full & 70% Speed
Noise output is dead low.
Speed (Percentage) – Noise
I use a different setup to drive the fan for noise measurements, so there might be a difference in the readings of the Longwin machine, especially in the max fan speed reading.
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Hello and thank you for the detailed review of the new Alphacool Apex Stealth Metal 120mm.
After reading your old articles I bought 3× Thermaltake TT TOUGHFAN 14 Pro and 3× Thermaltake TT TOUGHFAN 12 Pro to replace Be Quiet! SILENT WINGS PRO 4 140mm PWM and 120mm (Airflow in a MSI MPG Quietude 100S).
I find the framework to be of higher quality, more mature. I like the wiring without a sleeve, easier to fold and store.
For the same dB noise there is a vastly superior CFM and Static Pressure, and all this for almost a quarter of the price less (in Europe).
I was impatiently waiting for the Alphacool Apex Stealth in 120mm (and 140mm in 2024?) but your rigorous testing proves that there is a problem in the design of the blades.
I saved time and money thanks to you