The new 6L6GC-STR forwards the low end with pressure and has all the guts and bite to perfectly accomplish all those sounds from big cleans, classic R´n´R like SRV to modern hard rocking tones. It´s all there with live and breath and the little magic in tone that inspires to keep playing. This TAD 6L6GC-STR combines the famous reliability of the American made Philips/Sylvania STR series plus the beefed up blackplate system like the highly regarded vintage RCA 6L6GC tubes.