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Measurements Bluetooth
Wired
Raw frequency response plot show relatively little change when repositioning on the head indicating an earpad seal that works quite well. Roughly 5dB boost in the bass is desirable, but it extends to about 250Hz, which is about 100Hz too high causing some bloating of the lower midrange.
The gentle rise in the midrange starting at about 500Hz is good; it should ideally start lower, but…