I have a feeling that those who are far away from a speaker are experiencing interference. The speakers seem to be mounted on the roof so those on the front rows have a problem. It's not the volume. I think the sound from adjacent speakers travels a long way from speaker to our ears and hence if the speakers are at different distances, the same word arrives at a different time and merges. The result is indistinct noise.There were at least 6 people ejected from the Tunnel Club area after their first goal. Not by stewards or Showsec though but by a woman in a corporate looking blazer!
@Marvin you are spot on about the sound quality at the front of lower level. We’re lucky if we hear 2 words in 10!