Why does my peak light come on sometimes at zero gain? Ampeg suggests that I push in the -15 db, when this happens. However, I do have a BBE Sonic Maximizer that runs through the Send/Return in the back of the amp head, and this is, of course, rack mounted. So I never use the -15 db function. If gain is ever turned up too much, a clip light comes on the BBE, plus, I do use the compression on the amp (which is really a limiter), and that's always at 12:00. So with gain, at 1:00 or 2:00, and Compression at 12:00, the Sonic Maximizer clip light never goes on; given that, I think I'm fine, and the tone is always nice (good chops). Again, my curiosity is about the 7 PRO peak light always flashing with gain rolled completely off ( no volume on Master), just by plucking the E string. Is that normal? Is it a sign that I need to replace the 12ax7? I bought the amp brand new two years ago. *Note: the compression is always rolled off, when I check the gain.