| TAD : RT-EF86 Tube EF86; 6267
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Description from Thomann :
- The small pentode, selected according to "low noise", is used in many hi-fi preamps and also, based on the historical AC-15 circuit, in some newer guitar amps
- Even in some large-diaphragm mic preamps as in Microtech Gefell use this tube due to its sonic transparency