RGB amplification question

I am designing a pcb that will (among some other things) have an RGB amp to bring a game console up to the proper rgb level for an arcade monitor. I know how to bring the RGB levels up but do I also need to do anything with the sync signal? I have a correct sync already but do I need to do any coupling or amplification to this signal or can I just use it from the console with the amplified RGB signals as is?

should work like normal with the amplified RGB.

cheers,
-DT