Power Output Tubes by Electro Harmonix, Genelex, JJ/Tesla, SED, Svetlana, Tung Sol, Groove Tubes, Sovtek, and Mullard

Our matching procedures produce quad sets or greater. Power tubes are sold as matched pairs. If you need, for example, a matched quad - please order a quantity of '2'. You will then receive tubes that were all matched at the same time - we do not mix batches.