ONE PAIR - THD Yellowjacket cathode bias EL84s included

Make your champ go British! Turns a cathode bias octal tube into chimy grinding EL84.  Never took my other one out of my superchamp because it sounds so much better with the yellowjacket. If you've you got a tubby sounding champ (and you probably do :) this should do the trick, it did for me and has been in mine for over a year now.  NOTE: this is the cathode bias model. Thanks.