Tubes are now back in stock!

TungSol 6550 Matched Quad

Our Tung-Sol 6550 matched quads are carefully hand selected on digital equipment to match both static and dynamic characteristics closely. This avoids out-of-balance operation of pairs which often results in saturation of output transformer core that robs you of the deep thumping bass that this tube is capable of. Price includes 4 closely hand selected tubes.

Tung-Sol 6550 is a close copy of the original TungSol coke bottle designed and produced in the 1960's. Tung-Sol 6550 features triple ion-absorbing getters (two on the sides and one at the top) to ensure long lasting operation under high load.

Tung-Sol 6550 sonics is true to its retro-classic looks, and delivers super low distortion in vintage Class A high power audio amps while generating aggressive and full bodied tone in guitar amps. Tung-Sol 6550 is also excellent in Ampeg bass amps.


Manufacturer TungSol
Configuration Matched Quad
Package Includes
  • 4 x TungSol 6550