I have a 75 ohm adapter & used it with the AS-2 (and Meier Quickstep amp) earlier tonight. The results were not pleasing: a very forward midbass/lower midrange w/ a slightly recessed treble. In other words.. say goodbye to the AS-2 balance. Interestingly enough, the 'forward' frequency ranges remained surprisingly tight. It was listenable, but I can't imagine anyone who'd prefer this sound to the sound of, well, the proper AS-2. I asked Dale about the impedance characteristic of the AS-2 quite some time back.. he said it remains quite linear (at ~34 ohms) from end to end.
AS-2 means ASG-2 or