[2 pcs]

[1 pcs]

[4pcs]

1 piece = 1 piece (screen flow) (tranconductorance) dual pairing
2pcs = 2pcs (screen flow) (transconductors) dual pairing
4pcs = 4pcs (screen flow) (transconductors) matching group
Buy 2 4 8 = Accurate Matching (Matching Group)
Regarding matching, all of our tubes are matched in factory production workshops.
Match is accurate (not all tubes are matched).
It has the requirements and benefits of multiple tubes (4, 8, and 10) to meet your needs. The parameters of the two tubes are the same)
Beam output quadruple tube 6550 (6550A) has 35W (42W) anode limit power consumption. The audio amplifier provides 100W power with two push-pull outputs of vacuum tube A1 and AB1. At the same time, the 6550B can also be used for electronic voltage regulator circuits. The 6550B is similar to the KT88, and can be used for compatibility.
Note: Parameters in pictures are for reference only. Not all pipes are parameters in the picture. If you have parameter requirements, please contact customer service. Thank you!!!
Accurate pairing (matching groups), no parameter drift
Note: (Dont think it is a fake or overlooked product after you receive the tube)