Tungsol Reissue 6L6GC Power Tube, Apex Matched Quad

These are great tubes I'm trying them out for the first time in an early 70s ampeg v4b bass rig. Plenty of range, plenty of tone, getting more harmonics and bite now that they are burning in a bit and these fell on the lower end of the price range of stuff I've tried. Mine shipped quick, arrived in great shape. working on a 66 ampeg fliptop next and if tungsol makes what I need I'll certainly be considering them.

Tubes seem poorly made. I've only had them for a few weeks and one of them is already blown. Kind of defeats the point of a matched quad set.