Same amplifier !  Different tube !   Different voice !
Trying different voice by tube and adapter.Needn't change tube amplifier anything.Just connect tube and socket adapter.

Quantity : One
Top is E88CC,6922.  Bottom is 6SN7,ECC33.
Copper used for excellent conductivity.
Outstanding soldering taken in every adapter.
Accept custom manufacturing,if you need other types, please contact me.
Ceramic socket and gold pins for long life,Tough gold pins with a thick gold plating.
100% The polytetrafluoroethylene(Teflon) and Silver-Plated Wire.  Specialty:high temperature resistance.
The design of your tube amplifier is the use of 6SN7 or 6SL7,ECC32,ECC33,ECC35,5691,6592,B65. 
If you want to try E88CC or 6922. Only need to connect A and the adapter socket in together.
Then connect to your amplifier,begin to enjoy music.
Needn't change anything about your amplifier.
DataCaciques