Emission Lab EML AD1/ 350-M Mesh Plate Heater Current 1.5A Type Matched Pair

The EML AD1/350 Mesh is a high-end vacuum tube that recreates the sound quality and aesthetics of the classic AD1 vacuum tube, but with improvements that make it ideal for the modern audiophile. Designed based on Telefunken's high-quality models, it can handle operating voltages of 250V as well as up to 350V, resulting in a highly efficient design that reduces heat dissipation while drawing additional output. The EML AD1/350 uses state-of-the-art technology to eliminate the potential for grid currents at high operating voltages, providing consistent performance over time at any point of operation.

These tubes are characterized by a soft and silky sound quality, which accentuates the delicate expressiveness of vocals and stringed instruments. The unique elegant and rich sound of the 1930s and 40's 4V direct-heating triode provides a more subdued yet profound musical experience than the 2A3. According to German vacuum tube researcher Rainer zer Linde, "AD1 is the pinnacle of the European DHT triode and marks the end of its manufacturing era." The AD1 is truly a crystallization of history and technology.

In addition, the EML AD1/350 Mesh uses gold-plated grid technology to thoroughly suppress the grid current. It is resistant to aging peculiar to vacuum tubes and maintains a beautiful sound over a long period of time. Vintage 8-pin "side contacts" and 4-pin UX4 basses are available, making them highly compatible for your specific amp configuration.

If you're looking to take the sound of the good old days to the extreme, the EML AD1/350 Mesh is the perfect choice.

• Grey wire mesh anode mounted on a hard metal frame for maximum stability.
• Gold-plated Wolfram Grid.
• Soft Rubber Suspended Tube Base
• Cathode Tap Filament
• Slow-start filament for maximum longevity
• Anode voltage up to 350V
• Continuous use with maximum anode dissipation
• Cemented carbide construction.Philips and Tungsram's historic AD1 vacuum tubes often experience grid current and gas problems after the first 500 hours of use. In contrast, EML tubes have excellent tube bias stability and grid currents well below 1uA.
• Tube printing with real gold (metal), red color is glass baked into glass.

EML AD1 Filament Rating

EML AD1 Maximum Condition (Not at the same time)