It has now been a year since I first put the 1955 prototype stereo tube amplifier into regular use in my living room. Since then, it has operated reliably every day, typically for two to three hours, without a single breakdown.
Over this period, the amplifier has provided a warm, engaging sound across a wide range of music. I have particularly enjoyed listening to jazz and classical music, both of which seem especially well suited to the sonic character of this classic Mullard design.
This extended listening period has allowed me to appreciate the qualities of this stereo implementation of the Mullard 3-3 circuit, from the rich midrange of its single-ended EL84 output stages to the way it reproduces the natural decay and texture of complex acoustic passages.
What began as a personal construction project and technical experiment has become a dependable part of my daily listening. Its performance over the past year shows that a carefully built amplifier based on a vintage vacuum-tube design can be both practical and reliable while providing lasting enjoyment in a home listening system.