I have a Sherwood 8090 AV and energy Take 5.1 Speakers. I have had it all for some time and never had any problems, in fact have been very happy until recently. Recently I have found that I need to turn the master volume of the Amp up to a very high level to get a reasonable listening level from the speakers. Even so It seems the sound has become dull/ bland or just flat. EG if I normally listen at a Master volume level of 25, I now need to have it at 60 to hear it. Not sure if the fault is in my Amp or the Speakers.