There is also this review which seems to concur overall. I don’t know much about “Sound Guys” though. Strange that they have a pretty scathing write up but then rate the sound quality at 9.6 in their table at the top. Make of that what you will. Seems inconsistent and misleading to me.

https://www.soundguys.com/anker-soundcore-space-q45-review-78320/

> The Anker Soundcore Space Q45 sound quality is probably the headset’s biggest issue. It’s not all terrible, most users will get used to the headset’s sound after a few minutes of use, but it doesn’t hold up next to other options on the market. The frequency response curve deviates noticeably from our ideal target curve across all areas of the frequency spectrum. The sub-bass is slightly exaggerated, the midrange depressed slightly, and the higher frequencies are besieged by an undulating change in response that causes high-end elements in music to sound hissy, betraying the accuracy of the playback.