Could strange sounds like a wah plugged in reverse or delay oscillation cause the speakers to blow?
Only if you push the speakers too hard. Oscillations can indeed kill speakers, but only at high volumes. I don't thinkyou could kill a TR too easily though.
Nope, a wah plugged in reverse is what caused some of the noises on echoes.
I know but that doesn't mean it couldn't blow a speaker... The sound just seems to be really high and loud even at the most minimum volume. And why would a Twin Reverb be more "resistant" to this?