I do think the Infinity Preludes make Excellent speakers in the right application. They are excellent dynamic speakers with plenty of slamm and pace for HT and dynamic music! They are refined and clear enough, with negligable coloration on their own. They sound a bit more foreward in the pressence reigion however, and don't have the deep soundstage that other audiphile music speakers have. They tend to sound more "up-front" and 2 dimmensional than other audiophile designs. The Tweeter is about as good as B&W Nautilus and Proac, but not quite as good as the world class Dynaudio Esotar 330 or Wison Watt's tweeter however! Still, very good overall, and balance is excellent.
I do like the MTS's as I said, and would recommend without reservation to anyone doing HT/music systems! They are MUCH MORE DYNAMIC than most any home audio passive design largely, due to the powered subs and multiple drivers in helping. This is a plus with HT for sure.
So, in summing, they have the clarity of a Thiel speaker largely, they are articulate, uncolored, fast,dynamic and authoritative! They make matching with the likes of tube amps possible, and even to consider. I would much prefer using these over MOST ANY standard passive lower sensitivity/efficiency passive audiphile design for HT and rock dubties for sure! They are involving and have lots of pressence, are focused, and hard hitting...what you want from a HT speak, indeed.
If you are into light delicate music with a deep soundstage, that sounds more traditionally laid back, like a lot of intentionally designed audiophile speakers out there, they may not be ideal....liveable, enjoyable perhaps...but not ideal.
If you do on the other hand want neutrality, great deatail, dynamics apleanty, focus, and a good involving refined sounding dynamic HT/music speaker, they have great potential! Overall I think these speakers sound an awefull lot like the excellent Thiel 2.3 with better dynamics and authority! Altough the Thiels have a deaper soundstage...otherwise the sound is very similar musically.
If someone is having problems with them sounding "detached" from the bass, I would say check the set up! There's no reason they should sound "detached" in the bass for any reason! Get the Phase, location, and level matching and EQing right and you'll have pheonominal results!
Overall, these would be on my short list of speakers for HT/music dubties at their price range for certain...one of the best, if not the best Infinity has ever made. Nice speakers