What's your experience, and tips to keep OTL amps up and running happily?
If you are running higher wattage OTL amps (I ran 225 wpc) monoblocks. Try to make sure they are not placed in the same room/space as the house Thermostat; especially during winter, and especially if the room your wife frequents happens to be on the other side of the house.
Heat was a real issue. I don't recall a single multiple hour listening session where I was not shedding layers.