SOVTEK 6L6 WXT (Macheado)
This Sovtek 6L6WXT+ is modeled after the vintage RCA 6L6GC "Black plate". This 6L6 tube features larger plate dimensions and improved grid structure for increased power handling capabilities. It also features mica spacers with metal springs to eliminate tube rattle and microphonics. Sovtek claims it has 20 percent higher output than their 5881WXT.
From our review of the Sovtek 6L6-WXT+ tube: "Guitar-cable-amplifier. If this describes the rig you use, then this is one of two modern tubes you should consider. This is not a repackaged 5881 tube. Extremely low noise and a lack of microphonics combine with excellent ratings for detail and harmonic content to provide a tube of exceptional quality. These tubes can be used in any application. Plenty of power and great tone. We have tested these tubes with plate voltages ranging from 425 to 500 volts without problem. Biasing can be set from conservative to hot; again, no real problem and great tone will be delivered from most settings."