Frequency measurements with different inputs

[Jwg1749]

This is what I thought from the beginning; but it should happen too with the Toslink input (remember that all measures have been made without any change to loudspeakers, room or connections. So Toslink should give the same comb filter effect!

The tests made on Monday of this week were done with the loudspeakers moved around 15cm back each, to avoid these problems. Still the comb filter appears - except on Toslink. Same frequencies.

This is the most important part of the discussion. I'd have thought all comments about room effects are idle until we can explain the difference between Toslink and the other inputs.
As I said earlier, it may be a faulty Devialet.
Matt