I have heard the IRS Vs at PS audio. The sound was effortless regardless of spls. I found nothing objectionable about the mid range. Quite the opposite actually. In the room I heard them, they have since moved them to a different room/location, I recall incredible detail with a soundstage bigger than the actual room in which they sat. It’s hard to imagine anything that could compare to the scale these towers produced. The only thing that even came close to this was a room at RMAF in which they were running the top model of Focal speakers driven by giant and I do mean giant kilowatt mono-block amps (maybe mbl). And they running four massive speakers into a giant room. I believe the cost of that system was north of $2 million.
If you’re ever near Boulder Colorado give PS Audio a call and ask for a listen. They are very friendly and eager to give folks a listen to their demo rooms. AND yes they still have the IRS system in house.
Best regards
Birdfan