/diy/ - Do It Yourself

If I wanted to drive one of those cheap Class D mono amplifiers out of a phones headphone port, I have to use a stereo jack because otherwise a mono jack would constantly short gnd and right channel right?

Also what would happen if I tried driving one of those cheap amps way above line level, like 10v rms (30vpp)? pic rel for example says max 3v but doesnt say if peak or rms.