They are not thin sounding, but neither do they embellish the mids/lower mids that some speakers do to artificially enhance the midrange. That's why I called them linear. If you think you might prefer a boosted midrange you might prefer a speaker that does that. I find the RM25 mids to be very balanced and natural sounding, but thin is not a word I would use to describe any JA speaker I've heard. The mids are very present but just not overdone IMHO. They sound plenty large when called for considering their size, and their imaging, 3D soundstaging, and disappearing as a sound source are among the best I've heard from any speaker. Hope this helps and best of luck. BTW, there's a pair for sale here now at a good price that may be worth a look. No association with seller.