M , your problem sounds very similar to mine . With the Jeff Beck Bluray playing yesterday , the entire 'middle' of the sound fell away and didnt reappear . Getting close with the centre I found that only the tweeter was outputting audio initially , to be eventually joined by the mid-cone but not by the bass drivers frown

After turning it off for a while , I returned and tried some served Bob Marley which played fine . Then some King Crimson and again only the tweeter in the centre delivered .

I did ask that details of my problem be passed to someone ( anyone ) who would be willing to help me investigate further . This apparently was not done , so I am probably going to have to investigate exactly what M's interpretation of a ' guarantee ' is .

~M~

Mostly harmless. Comfortably numb.