E88CC-TK/6922 Black Diamond Vacuum Tube

About the E88CC-TK/6922 Black Diamond Vacuum Tube

The Telefunken E88CC-TK/6922 Black Diamond Series is a newly manufactured, cryogenically treated dual triode vacuum tube designed to resurrect the transparent tone and harmonic impact of historical Siemens and Telefunken tubes. It is ideal for use in microphone preamplifiers, phono stages, and other sonically tight audio input sections in home, studio, and live stage applications. Known for medium gain and low noise, it delivers clean headroom, precise imaging, expressive dynamics, and a full-bodied soundstage. The tube features gold-plated pins for enhanced signal integrity and balanced triodes for consistent, low-noise performance. Each tube is meticulously measured for critical parameters including transconductance, gain, noise, and microphonics, hand-selected, rigorously tested, cryogenically treated, and subjected to an extended burn-in period to ensure stability and superior performance. The E88CC is not a direct plug-in replacement for the 12AX7 due to a different pin configuration but is favored for amplifier designs requiring more clean headroom. Originally targeted for test equipment and radar, it is now highly regarded by audiophiles, musicians, and audio engineers as one of the best sounding input tubes available.