Ruby Tubes KT88STR Power Tube
An entirely new KT88, built in the style of the early British KT88.
All Ruby Power Tubes are matched using the Magic Parts™ matching process, and the base of the tube is labeled with the plate current and transconductance matching measurements. By matching these parameters, optimal performance and long life are ensured for your amplifier. Ruby Tubes come with a 6-month replacement warranty.Tube rating may vary from image. We're unable to accommodate requests for specific ratings.