I’ve never been able to get that little magnet to work right, tbh. There’s probably a thread on that.
As for your audiophilia, are they using the programs – there are three – specifically for listening to music? I like the two that I use – not the one for performers – quite a lot. As you say, they disable a lot of the noise reduction and so on. This is one feature that I’ve appreciated with the KS7s.