I have listened too and reviewed the sound quality of 5 different energy suppliers.
Which one is best? 
The winner is Octopus Energy. They have the best sound quality overall, with deep bass and crystal-clear vocals. Scottish Power is a good second option, with upfront and center vocals and a wide soundstage. E.ON, EDF Energy, and British Gas are all fair options, but they do not offer the same level of sound quality as Octopus Energy.
So there you go. Instead of discussing USB cables, get an energy supplier with improved sound quality.
- Octopus Energy: Octopus Energy's sound quality is excellent, it digs deep and is crystal clear.
- Scottish Power: Scottish Power is another good option for sound quality. Vocals are upfront and center
- E.ON: E.ON is fair option for sound quality, E.ON has an immersive soundstage.
- EDF Energy: EDF Energy can deliver clear sound at high volumes.
- British Gas: The soundstage is as wide as Octopus Energy's.
The winner is Octopus Energy. They have the best sound quality overall, with deep bass and crystal-clear vocals. Scottish Power is a good second option, with upfront and center vocals and a wide soundstage. E.ON, EDF Energy, and British Gas are all fair options, but they do not offer the same level of sound quality as Octopus Energy.
So there you go. Instead of discussing USB cables, get an energy supplier with improved sound quality.