UX45 Main
The Tape ProjectEstimated price (community-sourced)
About the UX45 Main
The UX-45 Main Amplifier is a collaborative design by John Tucker, Dan Schmalle, and Steve Brown, featuring a direct-coupled circuit with no protective capacitor between the driver and power tubes, which is acknowledged for superior sound quality. It uses the rare UX-45 tube, a 1930s vintage tube, producing approximately 1.8 watts of output power. Despite the low wattage, it can drive large, efficient speakers to room-filling levels due to the unique crossover and transducer blend of the speakers it is paired with. The amplifier has a large chassis with a carefully planned symmetrical layout for both electrical and aesthetic purposes. Modifications by Steve Brown have improved the original design significantly. The power supply uses a 5AR4 tube rectifier to avoid the high turn-on power surge issues seen with solid-state rectifiers. The amplifier is noted for its musicality, tonal quality, and ability to reveal subtle differences in audio sources and cables.
Specifications
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