The 174SR surround speakers use an advanced dipole design intended to create a diffuse, involving sound field. The full-range 174SR¹s each include two of the same 4-inch CCMG drivers as the front speakers. Highs are delivered by dual three-quarter-inch modified dome, fluid- cooled tweeters with excellent dispersion characteristics. Should you desire, the 174SR¹s are optionally available in a matte white finish (at no additional expense) and they, like the LRs, include keyhole slots for easy wall hanging.