Heathkit EA-2
The Heathkit EA-2 is an early stereo-era mono integrated amplifier. It is a tube design with a push-pull EL84 output stage and a 5Y3 rectifier. It was sold as a single-channel building block for stereo systems, and the record shows it could deliver 15 watts per channel in stereo operation or 25 watts in mono. The front panel has volume, bass, treble, balance/function, and an input selector, with multiple line-level inputs.
What's documented about the EA-2's sound comes from a single restored unit, described as warm, with a detailed midrange. That unit had been fully restored with NOS (new old stock) EL84 tubes installed. Audio noted that the EA-2 "sounds as good as it measures" and looks as good as it sounds.
Beyond that, the documentation is thin. No production years, dimensions, or frequency response figures have surfaced. The EA-2 is the predecessor to the EA-3, which Heathkit later advertised as its "thrilling successor" - a 14-watt mono amplifier that could also meet professional standards as a 12-watt unit, per period ads in High Fidelity (December 1959, p.38).
Known specs:
- Type: Mono integrated amplifier (tube)
- Output: 15W per channel (stereo operation), 25W (mono)
- Output tubes: EL84, push-pull
- Rectifier: 5Y3
- Controls: Volume, bass, treble, balance/function, input selector
- Inputs: Multiple line-level
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