The sound of glasswear

"A quick Google of it happening still seems the same."...what? I just googled and found nothing that mattered. If an idiot cranks an amp up all the way and the speaker cone jumps across the room I refuse to count that as gear related issues. I'm thinking about speakers that have blown near me since 1967. My keyboard player turned off the preamp of a ridiculous, gigantic, badly set up live system he was using (borrowed from the main act) at a disco in Hawaii in 1977...blew up the speakers. That's about it, other than loudness abuse here and there.

A lot of amps go DC by accident. Different songs with different volume, Accidentally cueing down with volume up. Years back I had company with kids, they ran through the room (when they weren't supposed to,not mine) and bumped right into my rack. When I seen the arm bounce, I got a sick feeling, sure enough when it landed of the record, kaboom followed by silence. Amp smoking, and fried speakers. Cheap amps like Cambridge?, no protection, amps like Krell, works sometimes. I'll stick with fuses. They work.

All of the tube amps Ive run, would just run out of power, or make racket through speakers, but not go DC.

A couple of links of the net about newer amps still going DC, and blowing speakers. [http://www.diyaudio.com/forums/solid-state/116149-cambridge-audio-a5i-blown-speakers.html][http://www.htguide.com/forum/printthread.php4?t=34748]

From looking at these links, neither seems to support the kind of scenario that involves a preamp. They both look like some sort of malfunction in the amplifier.

Many SS amps use a protection relay or similar circuit to detect DC at the output of the amp and either disconnect the speaker or shut the amp down to prevent damage. A relay that disconnects the speaker will be an impediment to getting the best sound out of the amp, so (oddly) we are back to where we were in the 1960s when speaker protection circuits were rare.