Used Groove Tubes GT 6L6 S MED DUET Power Amp Tube

Used Groove Tubes GT 6L6 S MED DUET power amp tube set in Good condition, ideal for restoring punchy American-style clean headroom and warm, dynamic overdrive in compatible amplifiers. This is a matched medium-grade duet (pair) of 6L6-type beam power tubes for balanced output and smooth response. Standard 6L6 operating class, designed for high-voltage guitar/bass amp power sections, delivering robust lows, clear highs, and reliable performance.