Puresound 2A3 Integrated Valve Amplifier The Puresound 2A3 is a directly heated triode integrated amplifier designed to deliver the classic valve sound with improved power and control. Using a push-pull 2A3 output stage, it combines tonal richness with greater drive capability than many traditional triode designs. Key features: • integrated valve amplifier• 2A3 directly heated triode output stage• push-pull Class A design• 18W per channel output• 3 x line inputs• ALPS “Blue Velvet” volume control• configurable 4Ω / 8Ω speaker outputs• can be used as a power amplifier Design and performance: The amplifier is built around the 2A3 triode, a valve known for its linearity and natural tonal character. Unlike lower-powered single-ended designs, the push-pull configuration here provides increased output and better speaker control while retaining the signature triode sound. A choke-loaded driver stage allows the 6SN7 valves to deliver a full and stable signal to the output stage. This approach improves tonal depth and dynamic expression, giving instruments a strong sense of body and presence. Materials and construction: • 2A3 output valves• 6SN7 driver valves• twin valve rectifiers• choke-smoothed power supply• SCR polypropylene capacitors• selected carbon film resistors The power supply uses twin valve rectifiers with choke smoothing, helping to maintain stability and reduce noise under varying signal demands. Sound characteristics: • rich, holographic soundstage• strong midrange presence with natural tone• improved bass control compared to typical triode designs• high level of detail and texture• engaging, immersive presentation The 2A3 design is known for its ability to preserve musical structure and emotion, offering a highly involving listening experience. Build and usability: The amplifier includes three line inputs for system flexibility and uses a high-quality ALPS Blue Velvet potentiometer for volume control. It can also function as a standalone power amplifier when the volume is set to maximum. A protective valve cage is included for safety where required. Specifications: • power output: 18W per channel• output valves: 2A3 (push-pull)• driver valves: 6SN7• inputs: 3 x RCA• speaker outputs: 4Ω / 8Ω selectable Brand and design: Puresound is a UK-based manufacturer focused on delivering high-performance valve amplification. The amplifier is designed by Guy Seargent, whose experience spans Audio Innovations, Voyd, Heybrook, JPW, and training in Japan with Audio Note / Kondo. Note: The Puresound 2A3 is best suited to medium to high sensitivity loudspeakers (around 88dB and above) to achieve optimal performance.
