STUDIO 698 Dual 8" 3-way compression driver Floor Standing Loudspeaker, 6" (152mm) PolyPlas Mid-range Transducer, Dual 8” (203mm) PolyPlas cone Low-Frequency Transducer, High Definition Imaging (HDI) Waveguide with 1” (25mm) High Frequency Compression Driver, Recommended Amplifier Power Max 250W, Frequency Response 36Hz – 40kHz, Sensitivity