Pass Labs XP-12 Line Level Preamp (Demo) Phono Stage Ultimately the difficulty and expense

Ultimately the difficulty and expense of SIT manufacture made them less competitive compared to later bipolar transistors

partly because two audio companies stepped up and spent the money required to fabricate new devices suitable for audio power amplifiers

Read and listen to many of the rave reviews on this product

coherent sound that only full range speakers can present

The SIT-5 is the most recent amplifier produced by First Watt

Pass Labs XP-12 Line Level Preamp (Demo) Phono Stage Ultimately the difficulty and expenseThe new XP 12 starts with a new power supply. It uses an efficient toroidal design with both an electrostatic and Mu metal shield along with vacuum impregnating and epoxy fill. This gives us a very quiet transformer both electrically and mechanically. The power supply circuitry itself is also lower noise and has additional filtering, a little more complicated but worth it. The XP 12 uses the single stage volume control borrowed from the XS line