12 volt trigger input and output, wiring?

is it possible to install an output trigger on an amp? i installed a 12volt trigger on a behringer inuke to control my subs, i have 4 outputs on a monolith htp-1 but plan on running 6 amps. i see the output is rate 50ma on the monolith.
is it possible to add an output 12 volt trigger to daisy chain amps or will this overload the output on my processor?