yep, I have heard them all. The 1072 is an extension of the 855 updated to superior sonics but with that same smoothness. The 990 is probably better in hifi standards. The 991 didn't sound as liquid BUT that could have been system dependent.
You really can't go wrong with the 1072 if you like the 855. It makes the 855 sound rolled at the frequency extremes and not nearly as dynamic or transparent but with the same smooth quality.
You really can't go wrong with the 1072 if you like the 855. It makes the 855 sound rolled at the frequency extremes and not nearly as dynamic or transparent but with the same smooth quality.