This reviewer received promo considerations or sweepstakes entry for writing a review.
These are really good speakers but I'm writing a review as a Martin Logan 15i bookshelf owner. My placement is right up against a wall on a bookshelf. (Not the best place to put a speaker as they should be a foot off the wall at least. The Motion B10 is not an upgrade to the 15i speakers, more of side grade. The B10 has an upper frequency boost that's noticeable. Sometimes a boost like that people perceive as more detailed. This isn't more detailed to me than the 15i but definitely a boost in the treble that adds a crispness that some will love but some won't if you prefer a more neutral sound as found in the 15i speakers. I personally think the 15i speakers are preferable slightly. They have a bit more oomph in the mid bass but again, that's in my room against a wall. Maybe I would enjoy the B10s more pulled off the wall than the 15i speakers?
So if you don't have the older Martin Logans to compare to, you can't go wrong with these. If you have the 15i speakers already, these are not really an upgrade sound wise. I also tested the Martin Logan XT B100 pair and those I would say are indeed an upgrade to the 15i speakers. I loved the sound of those but the problem with the XT B100s is that I ran into ear fatigue pretty quickly. I didn't tinker with them too much to knock back the treble because they were too big for my bookshelf space and I had to return them.
The B10 speakers were not as fatiguing to my ears as the XT B100s. The 15i speakers aren't fatiguing at all and are great for long listening sessions.
