I've got the ultimate rookie question, so please don't laugh (too much). I have a Dual Recto and oversized 4x12 cab that doesn't sound good @ high volume. The sound becomes muffled and not as distinct as it is at lower volumes. It is 2 mths old and I was told I need to "break the speakers in". Any suggestions would be appreciated. I am scared to death I'm going to ruin it by turning it up too much, and I have know idea what this amp is capable of volumewise.