The Chinese-made Groove Tubes Silver Series ST-6L6-C Power Tube offers you sweeter tone and nice break up. Latest design handles higher plate voltage and output is equal to the Russian tubes. New model, large straight bottle like Sylvania STR tube of the late 70's. High power, crisp tone with solid tight bass, great for Rock or Country, excellent value with more power and less cost than 6L6B (5881) Russian type.
Country of origin: China
Soft, medium, and hard style descriptions refer to break up modes of the tube for an overdriven guitar signal. Soft-rated tubes break up easier and have the least headroom, yielding a heavier, harder distortion. In comparison, hard-rated tubes break up easier and have the least headroom, yielding a heavier, harder distortion, while medium-rated tubes fall in between.