Soft clipping has nothing to do with bias.It is not possible to have a higher voltage out of the amp than the rail voltage (+60v/-60v).If you try, it "clips" the tops from your signal.When you turn up the volume more, your sine wave will turn into a square wave.Clipping has sharp edges.That distortion adds lots of high frequencies that are not pleasant to hear and kill tweeters.Soft clip is a way to stop the amp from reaching 100%.Sort of braking before you hit the brick wall.Leo..
[/!!! Lower that bias all the way BEFORE you put the power transistors in !!!!!! Leave it on low while testing the amp !!!Adjust after you have replaced the resistor with the original one.Leo..quote]It's been all the way down. I just crept it up .1v for a few seconds to see what effect it would have on the - side bias. I put it back down again. I'm not going to turn it up until i figure out why the Bias is already so high on the positive side without having it turned up.
Bias voltage is measured OVER C12