Triggering mono blocks without trigger capability

You could buy a something like a Niles AC3. That would work.

Good idea(easier than DIY), but- be certain your preamp’s 12V trigger, can provide a constant 100mA, if you go for the Niles. The alternative(if not) is a 12V/100mA (or better) , DC adapter(wall wart), that would plug into your preamp’s 125V switched outlet(provided there is one).

Furman makes a number of conditioners with trigger inputs. Works really well.

Basically a few of the outlets respond to the trigger signal when enabled.

Best,

E

McIntosh makes / made them
call the guys at Audio Classics has them used starting at about $200
i would not be inclined to plug an amp into a power conditioner

Erik, I like the Furman suggestion. Tom, what is your case for not
recommending amps into a power conditioner?