Adcom Amplifier Speaker Protection

Not countless speakers as Adcoms in general are reliable amps. Also when an amp fails it does not always do so in a way that would take the speakers with it but in those few times that it does its adding injury to insult. You could give yourself some level of protection by putting fuses on one leg of the speaker wires. It is easy enough to figure out the fuse value. There are many who would argue that it will effect sound quality by doing so but then there are well respected amps in the market that have fuses or relays inline to the speakers for protection.

Speaker protection is the speaker manufacturers problem, not the map makers.
I really never hear much of amp taking out speakers unless the speakers are being played way way too loud.
No special reason to worry about Adcom amps in that respect.

Some speaker makers do have some form of protection built in but most seem to rely on the amp maker to shut down the outputs if there is a massive fault in the amp.

DC protection circuitry can be added to an amp that lacks that feature, as long as there is room in the chassis. There's quite a bit of discussion on the topic at diyAudio forum. I've done such retrofitting. While catastrophic failures are rare, who wants the full rail voltage dumped into a pair of speakers with expensive or unobtainium replacement drivers ?