I have a Gem RP-X Piano Module.... Why is it when I had a Roland Fantom X8 the module sounded beautiful.... But now using it with a Tyros 4 it sounds like a toy. Everything is the same except using the t4 vs the fantom... Is it because of the amp inside the t4 vs the fantom amp... I am just using it as a controller. Does anyone know if it would sound better if I bought a keyboard controller like a M-Audio or Akai or some other midi controller... Any thoughts? thanks Ron