So we're saying just do it?! Ha ha I'm still a bit scared to be honest!
I messaged Taylor regarding the iron ether and this is what he said...
Hi Stephen, there's no danger of damaging the pedal, but the output of the synth is probably loud enough to overdrive the Nimbus's input. From some internet pics it does appear that the Quartet has an output volume slider so you should be able to get the levels right by using that to attenuate before the pedals. The high and low outs are probably referring to output impedance rather than high/low amplitude, so which you use probably won't matter to the Nimbus (though different impedances may affect the way your distortion pedals sound). Hope this helps, let me know if you have any other questions.
Thanks,
Taylor
What a helpful guy! = )
Thanks again,
Stephen