Most recent speaker you audited in room and returned? Why did you return it?

Having enjoyed Klipsch Heresy IIIs for a while I had to try the IVs. The mids in the IVs (after plenty of break-in) had a peaky upper mid issue so off they went. Tried a pair of Sonist speakers that just paled when compared to the superb Silverline Preludes I had then so sold those away, and a pair of Zu "dirty weekend" speakers were just not close to my Heresy IIIs in coherency and tonal accuracy so back they went. The IIIs have earned their place and are staying...for now...Volti Razz...hmm

KEF Reference 1 (pre meta). There was nothing overtly wrong with them, but they were rather flat and lifeless. I think they need a beefy class A amp to really grab them by the short hairs – I was not willing to go there. But my son-in-law seems to be enjoying them. 

Martin Logan XT-B100 ($1600+tax)  Picked them up last year on a whim when I was trying to put together a digital system in my living room..A streamer/TV 2.1 system. These bookshelves had just come out, user reviews were minimal but great, I didn't even listen to them in store. Online purchase. Gloss black and I felt they looked pretty nice. Not overly big in size, rear ported, hair over 20lbs., nice bi-wire binding posts. 6 1/2" woofer but with their new folded motion ribbon tweeter which is what the "people" were raving about. 

Listed at 4ohm with a sensitivity that is rated semi high for a bookshelf..93 or 94db. Which I think that is off a bit. I'd say high 80's after comparing them to my Polk's & Lintons with the same gear at the same time. I tried the Logan's with an Elac Alchemy, a Van Alstine ultimate 70, and an older B&K mosfet amp. My intentions at that time was to use the Elac due to the size, which was perfect for a minimal set up and it had good power. 

Right away I thought the Logan's sounded great. That tweeter is pretty amazing and sweet. Very extended and airy. Articulate & detailed. I could really crank it up and it never lost composure or got shouty or sibilant. The more I listened though the tweeter & woofer j

just didn't mesh well. While very clear and detailed it was a little to hot for me. I think a lot of people prefer this type of sound but it just wasn't for me. I used a sub with the set up and brought the highs down a bit with PEQ functions in my dac which definitely helped a lot but ultimately the speakers just didn't work for me. I don't really have anything bad to say about them, just not my type. I see that they still get glowing reviews. 

Sent back Tekton Double impacts. That tweeter array was not for me. Instead ended up with Legacy

@nitrobob , I had the double impact in one of my rigs for a few months before i offloaded it/gave it to my nephew. Of course, the Youtube reviewers/advertisers were singing christmas carols about it. It’s a nice concept in theory....trying to manage the midrange with the tweeter array (small drivers --> improved impulse response, etc), which should technically give a high level of resolution, clarity, etc in the midrange. But, it didn’t.... It could be tricky trying to optimize a crossover network for that type of design.