I'm not sure I ever got back to the OP about the issue of whether the Phil 3's were designed for music or HT or both. The answer is both, but with one obvious qualification. That has to do with extreme headroom. If you want to recreate the end of the world or a stampede of prehistoric reptiles at 108 dB, and if that is really really important to you, then there are probably better choices than the Phil 3 (or Salks, or Ascends). If, on the other hand, you just want to enjoy movies and devastation at loud--even very loud--levels, then a speaker that is designed for accurate reproduction of music over a wide bandwidth will do just fine in HT, particularly if a sub(s) is in play. The reverse may not be true. Colorations and other design limitations that may not be a critical issue in movie soundtracks may be very obvious on music. To repeat--accuracy is never a detriment for HT. The only issue is headroom, and even then it's only an issue if you
listen to movies at, uh, very special sound pressure levels.