The new 737-900 is wonderful, just a small request, the sound made by the stab trim of the plane is too low in volume, although I use the headphones at full volume, the sound is almost imperceptible and something beautiful about the 737 is that sound that perform the horizontal stabilizer when turning... please add more volume 👋

Stab trim 737
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- Official Post
The volume depends on other factors such as how loud the engine or air-conditioning are. Mobile devices seem to reduce the total volume if one of the sounds becomes louder, muting everything else. This is different on PC where the sound was created and tested for the most part.