SoundTube TCE1.5 PhaseTech Front Channel Speaker - 2 x 3" (Black)2 Way Ultra Thin CLR Front Channel Speaker. The TCE 1. 5 is a thin center eliminator. What is a center eliminator?" It is a system that provides discreet, three channel performance out of only two speaker cabinets. The upper portions of both speakers handle the dedicated left and right content, but the lower portions of each TCE act as mono center channels which are then fed the same center mix from your source. This creates the illusion that there is