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The Cool Valve ECC 803S Twin Triode Tube from EAT Products is the finest twin triode tube that can function as a replacement for ECC83 / 12AX7 tubes. Double triode means the valve is built with two totally independent triode systems.
Based on the design and build quality of the Telefunken ECC 803S, EAT has set a high standard by trying all existing ECC 803S in efforts to create the most accurate sound for their customers.
The selection procedure uses several measurements. All measurements are performed after a long burn-in procedure and thermal stabilization of its parameters. Only a few valves pass the selection process and even fewer pass the strict Diamond selection.
The inseparable part of the Cool Valve ECC 803S is the EAT Cool Damper. EAT developed a special high temperature glue to fix the damper to the valve glass envelope. This glue is designed to transform vibration energy into thermal energy, which is then dissipated as heat. The Cool Damper is designed as an effective vibration and micro-phonic absorbing device.