Larsen Loudspeakers

A "very reflective room" will likely present challenges for any speaker design.

Since the Larsen design is intended to increase interface with the room with their angled drivers, they might possibly be less successful than conventional designs which can direct initial sound waves more to the listener.  But I would think you'll need to add absorption to your room for any speaker to work well.

Oh yeah…those things. Very cool. I read a review someplace and thought they looked innovative, which is often rare these days…and regarding room absorption using "any speaker" (not including Ted Talks), I'm a big believer in furniture and carpets being tasked with that job, although people living in repurposed shipping containers (Abu Dhabi high rise workers for example) might need more stuff…I wear a fuzzy shirt and a thick headband made from long strand New Zealand sheep wool when doing any critical listening.

There isn't any simple exceptions in general for taking care of the room. It is important to do due diligence to get the room setup as best as possible to begin with, and go from there. 

My findings with the Larsen Model 4 I have owned for quite sometime now, is that it is just a lot less fussy about the room overall, and I can get away with less room tuning or enhancements there. Most of my room is "treated" by area rugs, the furniture and wall hangings, but nothing in the real "treatments" category such as GIK or others. And probably, some of these items could certainly help, but overall I am happy with the sonics of my system as it stands. 

Wolf, I like your style there, good one!