Distorted sound

Hi guys, some time ago I read somewhere (the tavern?) that the Genesis could produce clear sound but that had a cheap and bad quality amplifier that distorted the final sound.

Is this true? If so, could we use a compatible but better amplifier?
Uh well, the headphone amp in the Genesis 1 isn't too great, but the audio output (from the plug at the back of the unit) has no amplification - you can use whatever amp you wish.