Groove tubes GT-6550-R Med Quartet Tube
30 days to change your mind (Terms)
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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.
Quartet of power tube GT-6550-R Med
(Med= 4-7. Standard performance, ideal for playing all styles)
Euroguitar Reference : 55647