This is the Standard Retube Kit for the PRS MT 15. The preamp section uses six ECC83S's with one balanced for the phase inverter in V6. The default power tubes are the JJ Electronic 6L6GC’s. With the customize option you can configure this kit to use the JJ 6V6S's, EL34’s, EL34 II's, E34L's, KT77’s or Big Bottle 6CA7’s.
These amps are adjustable bias with test points.