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RE: KT88/6550 suggestions +1 more GL

have a quartet of each. The Mullard 88's have a fuller, much warmer sounding midrange than the GLs or the Tungsols. Not too far off the original Mullards from the UK.

Have the Mullard KT88s in a PL dialog amp with Jensen copper foil caps, and MILLs WW for the plate and cathode resistors.

If your re-worked amp is a tad on the warm side, the Mullards might be too much of a good thing. All depends on the other components that are used.

The Tungsol 6550s sound great (well balanced) in a Mac 275 or CJ MV75.

As one other poster noted, there are also some premium KT88s out there, but have not tried em.

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