Parkcaka, Your idea of trying the tape out signal to drive your other amp should probably not hurt either amp, but it could hurt your speakers because of the high volume. I would only recommend trying this if your source has a volume control, like some CD players and some phono preamps have their own volume controls. If so, I would turn the volume all the way down before trying this hook up. Newbee's suggestion of getting a passive attenuator is a good way to solve the problem. Good luck.