They're shaped differently, so probably not. Besides, plugging in a 120 volt device into a 240 volt power source would be disastrous to the device and not a good idea.
No, you can not plug a 240 volt amplifier into a 120 volt outlet. That said there are a number of step-up transformers available that will convert 110V to 220V - that's the simplest way to do it. You...
Do this electrical work only if you feel confident that you can do it safely. If not then this is the procedure that an electrician would use and you would be able to follow what he is doing. Again...