Isnt it true that speaker cones also are designed to operate best at a certain thermal equilibrium point? Most often I let my whole system warm up prior to a listening session. Does sound better after an hour.
Seems like the best "upgrade" for tube amps....
...is to leave the amps on for a few hours before playing. I've noticed recently that when I turn on my Joule amps and let them run for hours, it makes a huge difference in the dynamics and high end sweetness. It gets hot in our house, but it's worth it. Is there a technical reason for this?