SIT-4

About the SIT-4

The First Watt SIT-4 is the latest evolution in Nelson Pass's acclaimed SIT amplifier series, utilizing industrial-grade Static Induction Transistors (SIT) for a unique blend of tube-like warmth and solid-state precision. Operating in single-ended Class A mode, the SIT-4 delivers 10 watts per channel into 8 ohms, making it ideal for high-efficiency speakers. Its minimalist, zero-feedback circuit topology preserves musical nuance and dynamics, while the custom Tokin THF51s SIT devices provide a sonic character reminiscent of direct-heated triode amplifiers—without the need for output transformers. The amplifier features both balanced XLR and unbalanced RCA inputs, a soft-start power supply, user-adjustable bias, and robust aluminum chassis for optimal heat dissipation. With a high input impedance and 20 dB of gain, the SIT-4 is easy to integrate into a wide range of high-end audio systems. Its meticulous design and build quality ensure a deeply engaging, transparent, and emotionally compelling listening experience.