Polk Audio CSI A4 Center Channel Speaker (Single, Black) Reviews

 This piece replaced the RM6750 center channel that was underpowered and outmatched when I added my Monitor 50's to the left and right of the sound stage. I must say, that adding this larger center really made a different - audio popped, music rang and overall clarity was increased. The last piece of the puzzle will be the rear speakers and the subwoofer upgrade. I couldn't be happier with this center.