given Alberto Guerra’s career in the industry
From an interview with him about using empty 6550 tubes to house the GaN amplifier boards in.
"Company founder Alberto Guerra admitted that he did it largely for the sake of visual aesthetics. Otherwise a class-D amp just looks like a box”You don’t have to be too smart to see the tube pins are going to be a problem with a bit of age on them, especially if being used with a speaker that demands a bit of juice sucked through those tube pins. (like I said you may as well have spring clip speaker terminals)