AI-generated product photo — not official manufacturer imagery.
Estimated price (community-sourced)
About the SIT-5
The SIT-5 is the latest monoblock amplifier from First Watt, the fifth model employing a Static Induction Transistor (SIT) as the core amplifying device. It uses a Tokin THF51S SIT rated at 600V, 30A, 400W with 50 MHz frequency response, operated in Common-Drain (follower) mode without feedback. The design features a single-ended Class A output stage with a P-channel MOSFET for bias current, push-pull voltage gain stage, custom output transformers, balanced and unbalanced inputs, soft-start power supply, aluminum chassis, and user-adjustable bias. It succeeds models like SIT-1 to SIT-4, offering higher power for less efficient or lower impedance speakers compared to SIT-4.
Specifications
Key Specifications
Full structured specifications are available to members.
Sign up to see full specificationsSee the full picture as a member
Create a free account to see where to buy, full structured specifications, similar components, and the systems that pair this with other gear.
Sign up free