i just spoke with jon and he said all tinyboxes and pipsqueaks have the blocking caps on output and can tolerate up to 16V of PIP voltage. when i get my microdot cables ill give it a shot, might work out of the box but i guess it depends on the resistance of the output
the first device i tested it with a few months ago didnt trigger the mic input, in any case its easier to put a resistor inside of a cable than a cap, if you have to go that route