About 4 months ago i buy a laney Ironheart 120W and haven't play with it long enough and recently I do. It has 3 channels clean rhytm and lead and the problem is the rhytm channel has a little harsh distortion to my liking while the lead has the distortion amount I want but with mid scooped a little so it doesn't sound open enough for playing chords/riff. So anyway to turn it less harsh? Will changing tubes (currently stock 6l6) or preamp do it?