I have B&W P4 speakers, NAD C320 Amp, Yamaha CDX493 CD Player. Have had the system for years but have always found it to be too muffled sounding. Electric guitar that would normally be quite ear piercing just isn't and everyone sounds like their singing with their hand over their mouth! I have the speakers away from the wall and am using good quality speaker cable & interconnect. Is this just the nature of my speakers or could I significantly sharpen things up with a different amp? Any help greatly appreciated.