I think your problem is speaker cables. I had that problem a while back.
Maggies and rolled off treble
Hi folks, I don't want to offend anyone but I think Maggies, especially the older types have significantly rolled off treble! The sound is because of this rolled off treble rather midrange oriented, which could sound very pleasing, but at the same time there is limited resolution due to this treble behaviour. Of course I could be wrong and I'm suffering some sort of hearing disorder/loss, but this is to me a consistent finding. Listening to those Maggies is a nice listening experience, until... you fall in sleep because of the shelved down treble response.
Chris
Chris