Don came over last night for several hours. Keith, you will be happy that he twisted my arm, and we did quite a bit of ribbon panel position experimentation.
Unlike Magnepans and MartinLogans which have a much narrower sweet spot and are quite sensitive to toe-in, this Pendragon ribbon driver seems to have much wider off axis response. When the Prodigys were in the room there's no way I could've sat on a couch 3 feet to the side of the center listening chair and had a nice time listening to music.
Neither Don nor I heard the tonal balance change from moderate toe-in to pointed dead straight ahead (no toe-in).
Don feels the ribbons are projecting a lot of energy in the upper midrange area. I agree. He thinks this is making voices and instruments in that frequency range a little bit too prominent, a little bit bright. I think I agree
We experimented with A) acoustic absorption panels on the front wall, B) Tube Traps behind the speakers, and C) absorption panels on the front wall plus Tube Traps behind the speakers.
The absorption components did take the edge off of the brightness, but we couldn't figure out if we preferred A) or B) or C).
This upper midrange brightness point may be at the point of individual, subjective preference. I think I happen to agree with Don in that I still hear a little bit of upper midrange brightness, but Phil Ressler and JimFord disagree, at least upon first hearing.
Don felt the tonal balance of the Magnepan 1.6s was perfect, but I feel intellectually, at least, if not both intellectually and personal preference-wise, that they were a little bit rolled off.
Don felt that between the original moderate toe-in position and the dead straight ahead no toe-in position the soundstage moved a little bit, but he could not tell which way he preferred the soundstage. He felt with the speakers straight ahead the soundstage was pushed a little bit back toward the front wall, but that there was no change in depth.
Don feels that the LP playback in general is a little bit brighter than the tape playback in general. That could bring us back to Phil Ressler's point that the Denon may be introducing a bit of brightness.