What are your favorite songs or albums for illustrating a deep soundstage?

@blisshifi 

What happens to the image when the tweeter array is on on the inside (switching the left and right positions)? I would expect less toe in would be required and a a much better focus of the image but with the narrowing of the sweet spot.

@danager What you suggest is true for Magnepans, which I confirmed when I had them on the floor last year, but I believe these speakers may have different results to the design of the line array midrange drivers inherently having a very narrow dispersion pattern. T+A has recommended not to have the tweeters on the inside. My assumption is that there may be too strong of a treble response and the mids may not properly hit the ears due to the narrow dispersion. I would anticipate the crossover points would also be different, but I haven’t compared. Perhaps when I have some time I will experiment and see!

@danager and @blisshifi: One of the "tricks" with some Maggies (many line source designs, in fact) is to adjust toe-in so that the midrange and tweeter drivers are in phase with each other. In the manual for my Tympani T-IVa's, Magnepan advises how to do it, as that model's crossover does not compensate for lack of driver time-alignment.  

Reference track suggestions:

On by LA Priest from their Fase Luna album. It’s a little psychedelic which is reflective within the soundstage.

Aht Uh Mi Hed by Rahill from Sun Songs.

Bubbles by Yosi Horikawa from his Wandering album, but I think this had been suggested (maybe not?).

This is probably a bit grating and avant garde but I really liked the soundstage when I listened to it on my 20.7s last night. "Ozymandias" off the "Dystonia" album.

https://open.qobuz.com/track/209334759