TAD 6L6WGC-STR Quartet(4pcs) Premium Selected valves. Our recommendation for Amps of Allen Amps, Cornford, Diezel, Fender, ENGL, Headstrong, Hughes & Kettner, Mesa Boogie, Peavey, Soldano, Victoria and especcially all combo amps. TAD has the remakes of the all times favorite 6L6 classics of RCA and GE. The TAD 6L6WGC-STR has the warm lower mids and silky top end; exactly like the classic GE version of the 50's and 60's. The complex midrange and sweet heights are dedicated t oexcellence in a class of its own. The perfect choice for vintage amps like the Bassman, Twin or Super Reverb. The TAD 6L6WGC-STR is our prefered choice for classic tone with warm cleans and rich, sweet mids when pushed. The TAD 6L6WGC-STR is only 80mm high (without pins) and does replace 5881 or 6L6WGB tubes as well.