I tried to buy a whole new speaker set and it didn't help, I tried to buy a new powerstrip and it didn't help either, what is causing this issue?

Which cable goes from one of these speakers to the other in Microlab M-100U 2.1 Multimedia Speakers? I want to get a longer one, here is a picture of the speakers for reference https://img.ksp.co.il/item/15333/b_1.jpg? And this is the cable it cannot be removed

Hello there 2 years ago I bought a senn cx 300 II and it blocked all sounds from the outside, a few days ago it broke so I bought a new cx 300 II, same model and used the same ear adapters but this time it blocked way less noise, sound balance, bass and volume were also different so I tried...