This was ground breaking because one pair 6550 power tubes could produce the same power as four EL34 or 6L6 tubes. It didn't take long for tube amp designers to notice and quickly hifi tube audio amps from Heath, Dynaco, McIntosh, Fisher, Scott, and others could be found in living rooms all over America. A decade or so later, bass guitar tube amp icon Ampeg was using 6550 power tubes in their legendary SVT bass amps. Even Marshall got into the act, using 6550 output tubes in some of their JCM800 and JMP tube amps.
We have a large selection of 6550 vacuum tubes in stock. Here you'll find tubes by TungSol, Sovtek, Electro Harmonix, Winged "C"/SED, JJ Electronic, and Svetlana. Many of the 6550 vacuum tubes listed below have tube reviews submitted by our customers. You will also notice we indicate the Top-Sellers for the 6550 audio tube.
Be sure to click the “Additional Info” tab when viewing a specific 6550 vacuum tube. There you will find related articles and downloads such as datasheets, pinouts, ratings, and matching information when available. Other excellent links for technical information can be found at 6550 in Wikipedia, 6550 in Duncan Amps, and 6550 in The Tube Directory.