Yes, and it was this review which caused us to go "hang on a minute! the original production units were much better than that"! We did contact them about this, ISTR we were going to send them a later unit and they were going to re-do the audio tests. Actually, we were a little annoyed that they didn't ask us if we were aware of this issue before publishing the figures, because 40dB is pathetic and does indicate a design/manufacture problem.

ISTR we were down something like -0.5dB to -1dB at 20kHz on later mk2s and all mk2a's.

The stereo separation problem was due to a 100 ohm being stuffed in the car output circuit instead of 0 ohm - again, this was fixed on the production line & any units that came back to us had it done as a FCO. This, as you say, is a biggie - it's NOTHING to do with the aux input specs (which *does* have left/right interactions as the high-CMRR front end takes a ground input common to L/R to reference both from - it's likely that there will be some crosstalk introduced here).

Hugo