I have heard people say that the Denon 3802 has a roll-off in the upper frequencies. Can someone help describe where that roll-off starts? Is it just the extreme upper frequencies? Or does it affect the sound of higher pitched instruments? Violins? Trumpets? Piano? Cymbals? Vocals? I bought the Denon 3802 a couple of months ago and it is in the shop right now due to speaker hiss and a dullness starting in the upper mid-range going up. I'm sure that a roll-off starting in the dialog range is wrong, but when it comes back I want to make sure that the sound is correct. I bought the Denon 3802 to replace a Yamaha v596 that was occasionally way to bright, but I'll take the brightness over dull voices any day!