The Harman Kardon A300 (part of the celebrated “Award Series”) is a classic vintage stereo tube integrated amplifier produced between 1961 and 1963. Highly regarded by audiophiles and vintage electronics hobbyists, it delivers a warm analog sound signature and pumps out roughly 12 to 15 watts per channel (30W total peak output). This makes it an exceptional match for highly efficient, sensitive vintage speakers.
Technical Specifications & Tube Layout
The amplifier’s architecture relies on a total of 9 tubes alongside a solid-state power supply:
Output Power Tubes: 4 × 7408 tubes (which are heavy-duty industrial versions of the classic 6V6 power tube).
Preamplifier Tubes: 4 × 12AX7 tubes handling the low-level phono and line-level inputs.
Driver/Phase Inverter Tube: 1 × 12AU7 tube.
Power Supply: Utilizes silicon diodes in a voltage-doubler circuit, which provides excellent B+ voltage regulation and solid low-frequency responses.
