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 push into distortion than "A" version, a little harder sounding than "C". day warranty on power tubes, includes replacement of whole set if one tube goes bad. day warranty for preamp tubes. 3 year warranty on SubstiTubes and Solid State Rectifier. Check with M-Audio for warranty on GT microphones.
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