F2a

About the F2a

The Sean Casper F2a is a monoblock single-ended tube amplifier built around a single set of F2a, 5R4GY, and 12AT7 tubes per monoblock. It features a vintage Siemens/Klangfilm chassis design inspired by 1950s theater amplifiers. The amp delivers approximately 7 watts per channel but sounds louder and more dynamic than other amps with similar power ratings. It is praised for its remarkable clarity and transparency across the frequency range, with excellent bass articulation and a neutral tonal balance. The F2a is especially noted for its musical presence and detail, making it well-suited for jazz and live music listening. It uses a two-stage design with the 12AT7/ecc801 as the input stage and is set up for 8-ohm operation. The amplifier is hand-built with point-to-point wiring and vintage components, emphasizing quality and craftsmanship.