IMO, the darTZeel will handle the TADs just fine. It does get very hot, and it shuts off when it reaches a certain temperature limit. You might be getting those shut downs frequently not because of your speakers, but because the amps have no room to breathe in your rack.
I'd try the CTH where the AR preamp is right now, and crank up the volume.
alexandre
I'd try the CTH where the AR preamp is right now, and crank up the volume.
alexandre