Audiophilepure

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“You still get a similar emphasis compared to the F9 from 50-100Hz and a very slight sub-bass roll-off but it is not pushing down on the mids with that lower mid dip. Nor is it overly warming up instrumental timbre. As such, the F9 Pro presentation is a bit more balanced sounding than the F9, a touch more forgiving, and still delivering excellent resolution for this price point.”

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“Due to a multitude of vents on the inner face of each earpiece, the F9 Pro provides just average levels of isolation, just sufficient for public transport but they’ll get drowned out in louder environments. They are relatively low-profile and can be slept in comfortably, they also produce average amounts of wind noise despite their rippled texture. The F9 Pro wears comfortably, with a minor ache forming at the rear of my ears after several hours due to their slightly larger dimensions.”