Description
Upgrade your amp’s sound quality with the RUBY 6550ASTR Power Vacuum Tube. Finally back from the Shuguang factory, this high quality tube offers great sound. Trust a product expert for professional and objective results.
New remake of the GE6550, with tough, straight bottle. Sold as a matched Sextet (6). Reliable and tough tube to suit the AMPEG SVT2 and Classic bass amps.
All RUBY™ Tube power tubes come already matched. There is no extra charge for this service.
Ruby’s matching process is very exact and our tubes are matched within +/- 1 mA (mille amp) of each other.
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