I need help on the LINE 6 Spider 212 Combo Guitar Amplifier w/FX. Lately when I turn on the amp I have by default the amplifier in clean, but theproblem begins with the volume. I use the metal zone together with the amplifier and after activating it in cleanthe amplifier gives me very low volume and even if I increase the volume, ismaintained at the same level. I would like to know which type of problem may be. other effects works well, has only failure on the clean effect it has solution?