I have a 2204 (from 1977) which has High and Low sensitivity inputs (one channel, with preamp master volume). I do not use the Low, and would like to have my guitar go into two separate amps simultaneously. I am wondering if I can rewire the Low jack to take the input from the High jack, thinking this essentially will then let me plug an instrument cable into the Low jack and run it to a separate amp when I would like to run two amps. Can anyone tell me if this is correct and safe? I would be disconnecting whatever is currently hooked up to the Low jack. I would need the amp to function normally if an instrument was plugged into the High and I did not have anything connected to Low.