Ruby KT66CZ Power Tube Matched Quartet JJ
JJ KT66 is a beam power pentode with an octal base and power of 25W. It has a powerful sound with a lot of headroom.
All RUBY™ Tube power tubes come already matched. There is no extra charge for this service. The Ruby matching process is very exact and our tubes are matched within +/- 1 mA (mille amp) of each other.