This is probably true for most people. I was just really unlucky, having to replace my 6550s twice in a year.IMO the 100 is superior in every way based on features with the lone exception of the 2A’s ability to push two cabs simultaneously. Some cite the use of 6L6 replacement being cheaper than 6550s. My thoughts are the amount of times in a decade that’s necessary (if even once in a decade) make this a nonissue.
The 6550s do get pretty warm. I couldn’t say how much warmer than a pair of 6L6s. Regardless, the attenuation circuitry generates just as much heat when cranking a 50 watt amp through the unit for about 30 minutes. I can put my hand above the fan that ventilates the resistors, then above the tubes, and it feels about the same - the point being that both the PS2A and the PS100 will generate a fair amount of heat from just being an attenuator. IMO, the ventilation of the PS100 is sufficient. There are vents below and above the tubes, and none of the circuitry is in the way of the ventilation. I’ve only had my unit for a year, but I haven’t heard anything about the PS100 being less reliable.Yeah, I am probably overthinking the the tube thing. But I figured, both units sharing the same limited enclosure space (and ventilation) but with larger and hotter tubes could lead to a shorter lifespan in general. But you are right, I seldom have had to replace tubes. In fact, most of the time was not due to failure, but as a preventive measure or slight micro phonic artifacts that developed. And I mean really slight.
The TAE is certainly worth consideration. I sometimes wish my PS100 was a solid state device, just because of reliability and ease of maintenance. It’s my opinion that the PS is quite transparent, despite its use of vacuum tubes. But that still begs the question, why not go with a SS power amp?TAE does a ton more, doesn’t color your tone with tubes and is cool as a cucumber.
Jus’ sayin…
Ultimately I went with the PS because of the fact that the TAE runs your signal through AD/DA conversion all the time. I’ve come to realize that this reasoning was silly. My H90 pedal has no analog dry through, and I can’t hear any difference. Converters these days are amazingly good. I don’t regret my purchase of the PS100, though, partly because I bought mine before they raised its price, and partly because I don’t think I need the extra features of the TAE.