Trelja
According to Granite, the dac used in the player (PCM1710), includes analogue voltage output (op amps). So the signal to the tube stage fed from the dac has already passed through solid state circuitry. Just FYI. When assessing your player the sound is more of the hybrid variety than a true tube player (with the tubes performing ALL voltage gain). The Granite's tube output stage is a 2nd gain stage, acting like a preamp. In fact it IS a preamp with volume control :-)