JJ 2A3-40 W Power Vacuum Tube

The JJ 2A3-40 is a high-power directly heated triode vacuum tube designed for audiophile-grade single-ended tube amplifiers, offering up to 40 watts of plate dissipation—significantly more than a standard 2A3—which gives it greater headroom, improved dynamics, and a rich, warm sound character with excellent clarity and tonal balance.