Ruby Tube's best 6L6GC tube. Full sounding with good power and very durable construction. A rugged copy of the Philips STR tubes.
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.