KEF T301 Satellite SpeakersSlim profile full sized satellite speakers With a flat screen TV, you want speakers to match. Really flat. More importantly, you also want to fill the room with high definition 3D sound thats every bit as involving as whats on screen. In the larger models, the same high performance 25mm (1in.) vented tweeter is paired with two 115mm (4. 5in.) ultra low profile bass and midrange drivers for an even bigger sound.