I know this isn't a Marshall but was hoping y'all could help me with it the Carvin forum seems to be down. I Just re tubed and biased a Carvin Legacy 100 Steve Via head for a friend. I was told the amp had issues before hand with the volume coming and going and then it just quit altogether. The tubes did show signs of past red plating on 2 of the EL34 power tubes. I went through the test procedures to gather the info needed to bias the tubes and set the bias to 180mA across the standby switch. The amp now works and shows no signs of red plating but sounds like crap! On the clean channel you can hear a very noticeable distortion not a good distortion but a nasty distortion like a blown speaker sound. I did try another speaker cabinet and the other output speaker plug and no change. The same nasty sound can be heard in the background of the distortion channel too and it sounds like its farting out also. I'm thinking there has to be a bad component in the circuit somewhere but I didn't see anything obviously burnt up or worked on before. I just downloaded the schematic but I need some advice on where to look for the problem (somewhere in the pre amp stage maybe). Would it be a resistor or capacitor issue? Here are my test results I got when biasing. The plate voltage was a little high .pdf file said it should have been around 450 and the dropping resistor voltage was a little high .pdf file said it should be around 10vdc. Plate voltage was 483vdc, Dropping resistor voltage was 12.1vdc, current across Standby switch was 160mA, current across the dropping resistor was 34.57mA.