I've not had a problem with my Gallos and listening at high listening levels. I did blow three mid-drivers when I was hosting a party and we were, ahem, performing karaoke over them. My wife still laughs at the thought of seeing smoke puff from the dust caps mid-peformance. I returned them to Gallo, which confirmed that they were really fried. We were not singing at high levels.
I do not listen to classical music, but do listen to a lot of acoustic jazz, and I've never had a problem with dynamics and well recorded jazz.
My conclusion: The Gallos can absorb power, but that should be relatively clean power. I suspect the cheap microphones we used are distortion magnets, and the Gallos do not like prolonged distortion, even at low volumes. Feed them clean current and no problems.
I do not listen to classical music, but do listen to a lot of acoustic jazz, and I've never had a problem with dynamics and well recorded jazz.
My conclusion: The Gallos can absorb power, but that should be relatively clean power. I suspect the cheap microphones we used are distortion magnets, and the Gallos do not like prolonged distortion, even at low volumes. Feed them clean current and no problems.