Most importantly, the guys know their stuff. They diagnosed it, found the problem, replaced the cable, and didn't take much money.
But! Not without shoals. The old cable that needed to be replaced was left in the beard and a new one was thrown over it. The grill on the right subwoofer is dented, nothing critical, but very unpleasant…
The sediment remained very unpleasant, because initially everything looked flawless.