Bought a nice pair of MB-450 monoblock amps that need to be re tubed. One bad tube shorted the screen resistor which I have repaired. This is the manual bias model.
I know VTL frowns on anything that is not bought thru them and anything other than 6550 used in this amp, however, I would appreciate any input from MB-450 owners on their preferences for power tubes and why.
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