Groove Tubes Gold Series Gt-6550-R Matched Power Tubes Low (1-3 Gt Rating) Quartet
GT-6550-R Duet Highest power pentode for use in Marshall, Hiwatt, Ampeg SVT, the GT amps and a few other higher powered amps. Also popular for HiFi amps. Newest entry, power and quality should mean long life. Excellent response, yet it’s easier to pCountry of origin: Russia
Groove Tubes Groove Tubes Gold Series Gt-6550-R Matched Power Tubes Low (1-3 Gt Rating) Quartet 5550113479 Accessories, Amplifier Parts, Tubes for Instrument Amps, Power Tubes

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“Groove Tubes Gold Series Gt-6550-R Matched Power Tubes Low (1-3 Gt Rating) Quartet“