JBL Loft 50 Three-Way Dual 6-1/2" Floorstanding Loudspeaker - Pair (Black) 10 - 250 watts suggested amplifier range Dual 6-1/2 (165mm) and triple 4 (100mm) PolyBass drivers 1 (25mm) soft dome tweeter with EOS waveguide FreeFlow port technology Straight-Line Signal Path (SSP) design