EZ81
The JJ EZ81 has special plate alloy material and improved design for better performance, stability and life. This is a great rectifier tube for the little 20 watt Marshall's or any other small guitar or Hifi amp that uses a 6CA4. Link to spec sheet
GZ34
This tube is a close replica of a Mullard GZ34. The plate construction is almost identical to the large base Mullard GZ34 with the straight edge plates. Very good in the Mesa Dual and Triple Rectifier amplifiers to replace the 5U4's and stiffen up the sound a little. The JJ GZ34 is also very good in the Deluxe Reverbs. Link to spec sheet
