Douk Audio F3 HiFi Tube Amplifier Class A Single-Ended Stereo Audio Amp

Single-ended Class A Tube Amp: The F3 uses a single-ended Class A tube circuit for smooth, continuous amplification, helping vocals sound softer, instruments more textured, and music more relaxed. Connect RCA line sources such as DACs, CD players, or streamers for a warm HiFi listening experience. Classic Analog Tube Sound: GE 6DK6 driver tubes help shape clear mids and vocal presence, while Valvo PL84 output tubes add warmth, rich harmonics, and natural tube character. Together, they create an analog tube sound that balances clarity, texture, and long-session listening comfort. Refined 3.2W × 2 Class A Output: With 3.2W × 2 of pure Class A power, the F3 is tuned for high-sensitivity passive bookshelf speakers. Its smooth output character gives vocals more body, preserves natural dynamics, and keeps music relaxed, coherent, and easy to enjoy.