Hey first post here!!!how come the jcm 2000 should be biased att ca 90mv and the jcm 600 att ca35-40mv and both have el34 tubes. I have measured platevoltage in my 600 and its 495v (if i remember correctly)but not yet done it in my jcm 2000 but i meen it must be similar voltages (am i right??) so why is it 90mv in the 2000??and can you bias it att 40mv and not kill it??