I received a pair of Prime Towers a few days ago. Still breaking them in.
Initial impressions were mixed. First thing I noticed was the huge amount of details these bring out, definitely more than my Def Tech Studio Monitors. This is a good thing for me because I sometimes learn music from recordings, and these don't hide anything. But while detail was incredible, the sound was not well balanced. They had a lot of bass (more than I expected) and the highs were incredibly loud bordering on uncomfortable, but the mids were just too quiet. It made the voices sound thin and flat.
Well, I was able to break them in for about 15 hours so far, and it was enough to transform them. Now trebles sound smoother and less piercing, but more importantly, recordings now have pleasant midrange. Vocals sound naturally warm without being exaggerated. Just perfect. The balance between the drivers became very smooth, without noticeably favoring any particular range. I know this shift in sound is not my imagination or ears being accustomed to the new sound. I was breaking these in playing mono tracks out of phase with speakers facing each other in close proximity in the other room. I hardly heard anything this entire time.
By the way, my 18 years old Pioneer stereo receiver with 100 watts per channel makes these rock hard, beyond comfort zone. My Emotiva 200 watts per channel amp takes them to the next level. There is definitely no lack of sensitivity.