just below the safety warning it explains how to move the amp (the valves have to be let to cool down and removed and stored in secure packaging) but in them days you normally brought the people to the sound. It can drive not just 100 volt speaker lines but 250 volt lines (this is so telephone cable can be used which is thinner and less expensive). Its not actually as scarey or dangerous as it seems though if the safety rules are followed and by the standards of the time had really good audio quality…