$139.99
One of the highest-output 8-pin pentodes available. Originally manufactured in the United States by G.E.®, it delivers 35 to 50 watts per tube and was original equipment in amps during...

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One of the highest-output 8-pin pentodes available. Originally manufactured in the United States by G.E.®, it delivers 35 to 50 watts per tube and was original equipment in amps during the ’70s and early ’80s. A big, clean, tight tube with amazing headroom and performance and great power and dynamics. A similar tube is the KT88 (used by Sunn® and others). The highest-output power tube in this family.

Our highest-output 6550 is slightly easier to push into distortion than the original G.E. version and has a harder response than the "C" for tighter, quicker response. Good for bass amps and metal, when more pronounced note definition is desired with just a touch of distortion.

Matched duet of GT-6550-R tubes rated from power range 1-10. Each duet has a specific rating (i.e. R2, R7, etc.). Tubes are matched and biased to a specific output level.

  • R1-R3 = Low: Early distortion, wide range, softer attack good for Rock and Blues solos.
  • R4-R7 = Medium: Normal performance, great dynamic range/attack and best all around rating type for all styles of playing
  • R8-R10 = High: Most dynamic range, most clean power/less break-up for power players, Jazz and bass amps.

Please review item descriptions to ensure proper ordering.

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We never stop approaching perfect. Please allow 7 to 10 for delivery.

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