PROGRESSION PREAMPLIFIERThe Progression Preamplifier adds new features previously not included in a DAgostino preamplifier. Most noticeably, the Progression Preamplifier features an optional digital module. The digital module adds coaxial, Toslink, and USB capability to the analog base model. A fully differential DAC handles PCM signals up to 24 bit 384 KHz and DSD signals up to 4xDSD (11. 2 MHz). This digital module feeds a discrete, fully complementary and balanced analog