Dc voltage sent to my speakers

@mulveling  , forgive me for my limited ability to understand electrical theory, but based on what you typed, assuming the applicable cap failed inside a tubed preamp, the output transformers of the tubed amp (assuming a tube amp was behind the pre) would still protect the speakers from DC voltage?

Oh, forgot one, often BJT amps will also have some sort of thermal runaway protection.  Otherwise, no I haven't seen a lot of SS amplifier schematics with "turn off on DC" on the outputs.

But, I'm not a tech, just a hobbyist who stopped pouring over schematics a long time ago.

Lesson learned always have pre owned equipment checked .

Um, not the one's I've seen especially "high end" amplifiers that pride themselves on not having any.

@erik_squires 

Sounds cringeworthy to me- yikes!

If you want fancy amplifier output protection you need to stick to Class D. 

Not really joking but looking at the Hypex and ICEpower spec sheets they have a lot of fault detection and shut down circuitry built in that most linear amps never even think of.  Maybe the need to target pro sound helps them build paranoia into each amp?