Just switched over from my 5150 II to a block letter. On the block letter, at full gain the red and green channels sound almost identical. The red channel may have very slightly more fizz and scoop to it but they sound almost exactly the same. Is this normal? Im coming from the 5150 II and there was a world of difference between the red and green channels. Also I cant hear any difference when I turn the bright button on and off. Is my amp broken or is this normal?