I am feeling terrible. I wrote a few days ago asking if the B&W XT4 speakers would work with my 80 watts RMS per channel receiver. I got a good reply from `The Master´ who said `they could work well´ but suggested some more powerful amplifiers. Tonight I went for a listen at the sellers house...luckily not too far away...loved `em, and to my delight he suggested I take them home for a listen. Worked really well. Then after about two hours and listening at a high volume to the end of the Firebird Suite there was a sudden blue flash from the right speaker and the sound just stopped? Now my old speakers which I plugged back in don`t work either so I suppose it must be the amplifier...or what? I am not a technical person. Have I done something wrong? Used wrong leads or something...my leads are pretty simple and were (are!) connected to my old B&W speakers which are from the 70`s. As I say, for two hours just perfect..and not loud the whole time, a variety of stuff, then this. I feel absolutely terrible as the speakers are as it were on trial. What now??? Many thanks. I certainly wont sleep tonight.