Back to back MOSFETs suggested here will work but they need a 10V floating voltage source or some photovoltaic coupler to a DC detection circuit. These have time delays. The tweeter should be able to handle a short single spike. Average power will be low.
Power requirements for a tweeter is very low so driving from a 100V source kinda don't make sense. Bi amping using low power amp for tweeters does.
Tube amps have transformers isolating from DC and typically sound good.
A normal mechanical relay has a delay time as well, like 8 - 20 ms so some energy will reach the tweeter. I would think there is a cap in series with the tweeter, that will block DC. A small relay could be placed after the cap maybe even a reed relay.
As some have posted here, a fast crowbar circuit is used to blow a fuse where extreme protection is needed.
If a power amp has glitches that puts DC on the output it should be fixed or else replaced.
Additionally, HF energy can pass the speaker high-pass filter and some protection for the tweeter is needed here. I have burned up tweeters with amp stability problems. Perhaps limit the max frequency the tweeter is exposed to.
DC on the output of audio amps is a problem that was solved 40 years ago, as I can recall. This really should not be an issue.
Power requirements for a tweeter is very low so driving from a 100V source kinda don't make sense. Bi amping using low power amp for tweeters does.
Tube amps have transformers isolating from DC and typically sound good.
A normal mechanical relay has a delay time as well, like 8 - 20 ms so some energy will reach the tweeter. I would think there is a cap in series with the tweeter, that will block DC. A small relay could be placed after the cap maybe even a reed relay.
As some have posted here, a fast crowbar circuit is used to blow a fuse where extreme protection is needed.
If a power amp has glitches that puts DC on the output it should be fixed or else replaced.
Additionally, HF energy can pass the speaker high-pass filter and some protection for the tweeter is needed here. I have burned up tweeters with amp stability problems. Perhaps limit the max frequency the tweeter is exposed to.
DC on the output of audio amps is a problem that was solved 40 years ago, as I can recall. This really should not be an issue.